Store data without Scanf (C Program)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>

/*

this program takes inputs from user and stores them into specific locations wherever  user specify
without using scanf function.

*/

void omarin(char *s, ... ); // this function do the functionality of scanf .

int main()
{
    printf("\n\t\t>> NOTES <<\n");
    printf("\nthe program will take inputs from you and stores them into variables without \
scanf function.\n\n");
    printf("you can change types of input you want to enter from main. \n\n");
    printf("now please enter integer value , float value ,and  char ,please put between them\
spaces and finally press enter to stores them in variables.\n\n ");

    int integer_value;
    float float_value;
    char c;
    omarin("d f c ",&integer_value,&float_value,&c);
    printf(" integer = %d\tfloat = %f\tchar = %c\n",integer_value,float_value,c);
    return 0;
}

void omarin(char *s, ... )
{
    char sr[20][20]={'\0'};
    char st[30]={'\0'};
    gets(st);
    int lenst=strlen(st);
    int counter=0;
    int arr[20]={0};
    int k;
    for(k=0;k<=lenst;k++)
    {
        if(st[k]==' '||st[k]=='\0')
        {
            arr[counter]=k;
            counter++;

        }
    }
    int h;
    int index=0;
    int jk=0;
    for(h=0;h<10;h++)
    {
        int jk=0;

        if(arr[h]!=0)
            {
                int j;
                for(j=index;j<arr[h];j++)
                {
                    sr[h][jk]=st[j];
                    jk++;
                }
                index=arr[h];

            }
    }



    union Printable_t {
                            int *     i;
                            float *   f;
                            char *    c;
                            char *    s;
                      } Printable;
    va_list arguments;
    va_start(arguments,s);
    int len=strlen(s);
    int i;
    int w=0;
    for(i=0;i<len;i++)
    {
        switch(s[i])
        {
        case 'd':

               Printable.i=va_arg(arguments,int*);

               *(Printable.i)=atoi(sr[w]);

               w++;
               break;
        case 'f':
               Printable.f=va_arg(arguments,float*);
               *(Printable.f)=atof(sr[w]);
               w++;
               break;
        case 'c':
                 Printable.c=va_arg(arguments,char*);
                 *(Printable.c)=(sr[w][1]);
                 w++;
                 break;

        }

    }

}

Read more ...

Simple program to create a moving car in graphics

#include<graphics.h>

#include<conio.h>

#include<dos.h>

void main()

{

int gdriver=DETECT,gmode,i=0,j=0;

initgraph(&gdriver,&gmode,"c:\\turboc3\\bgi");

for(i;i<420;++i)

{

line(0,245,650,245);

line(0+i,200,210+i,200);

line(50+i,200,70+i,170);

line(70+i,170,140+i,170);

line(140+i,170,160+i,200);

line(85+i,170,85+i,200);

line(125+i,170,125+i,200);

line(0+i,200,0+i,230);

line(210+i,200,210+i,230);

line(0+i,230,50+i,230);

circle(65+i,230,15);

line(80+i,230,130+i,230);

circle(145+i,230,15);

line(210+i,230,160+i,230);

pieslice(65+i,230,359-j,360-j,15);

pieslice(65+i,230,179-j,180-j,15);

pieslice(65+i,230,89-j,90-j,15);

pieslice(65+i,230,269-j,270-j,15);

pieslice(145+i,230,359-j,360-j,15);

pieslice(145+i,230,179-j,180-j,15);

pieslice(145+i,230,89-j,90-j,15);

pieslice(145+i,230,269-j,270-j,15);

if(j==179)

j=0;

++j;

delay(30);

cleardevice();

}

closegraph();

}

Read more ...

1-Dimensional Cellular Automata (C++ Program)‏

#include<iostream>
#include <string>

using namespace::std;

int main(){
    
    const char a = 'X';
    const char d = ' ';
    
    //explaination for the user
    
    cout<<"This program displays a one-dimensional cellular automaton.\n\n"
        "A cellular automaton displays successive iterations (in this case the next row) based on the previous "
        "according to predefined rules. Here is an example of this. \n\nPress enter to iterate and enter 's' to stop."
    "The initial rule is any cell with only one neighbor is an X (alive=a) in the next time step.\n\n"
    "Otherwise, it is blank."<<endl;
    
    cin.get();

    char row1[]={a,d,a,d,a,d,d,a,d,d,d,a,a,d,d,a,a,a,d,d,d,a,a,a,d,d,d,d,d,a,d,a,d,a,a,d,a,a,d,a,a,d,d,a,d,d,d,d,a,a,a,a,d,d,d,a,a,a,d,d,d,d,d,a,d,a,d,a,a,d,a,a,d,a,a,d,d,a,d,d,d,d};
    char row2[]={a,d,a,d,a,d,d,a,d,d,d,a,a,d,d,a,a,a,d,d,d,a,a,a,d,d,d,d,d,a,d,a,d,a,a,d,a,a,d,a,a,d,d,a,d,d,d,d,a,a,a,a,d,d,d,a,a,a,d,d,d,d,d,a,d,a,d,a,a,d,a,a,d,a,a,d,d,a,d,d,d,d};

    string currentRow=row1; // The current character array is assigned to a string.
    string nextRow=row2; //The next character array is assigned to a string.

    //two strings must be used. All cells change at the same time
    //They represent two discrete time steps. The references will be switched at the end of the loop
    //when the next row becomes the current row.

    cout<<currentRow;
    
    while(cin.get()!='s'){//This steps though upon carriage return unless the user selects 's' for stop
        
        for(int i=0; i<currentRow.length(); i++){//iterate over the row
            
            //set neighbors to zero for this cell
            int neighbors=0;

            for(int j=i-1; j<=i+1;j+=2){

        //iterate through neighboors (i+1,. Must avoid out of bounds. To do this we need the index of
                //to always be in the array. The left neighoor of the first cell is the last cell the right neighbor of the last cell             
        //is the first cell. The field is 'warped'. 


        // index:       [0]     [1]     [2]     [3]  
            //neighboors  [3] [1] [0] [2] [1] [3] [2] [0]

        //must reassign to a different variable because j is a loop condition. 
        //Manipulating j for the following calulation directly causes an infinite loop.

        int k=j;
        
        //this causes k to be the index of the neighbor cells of index i.
        k=(k+currentRow.length())%currentRow.length();

                if (currentRow[k]==a)//test if neighboor is alive (a is a const char)
                neighbors++;
        }


        //the possible values for neighbors are 0,1 and 2. Change this for different behavior.
        if (neighbors!=1)
        nextRow[i]=d;
        else
        nextRow[i]=a;
        
        }
        cout<<nextRow;

            string temp = currentRow;
            currentRow = nextRow;
            nextRow = temp;

        
        
    }
    
    cout<<"Thank you. If you are interested in cellular automata, look up John Conway's game of life."<<endl;

    return 0;
}

Read more ...

SuperMarket Database (C++ Program)

#include<fstream.h>
#include<iomanip.h>
#include<stdio.h>
#include<string.h>
#include<ctype.h>
#include<windows.h>
#include<process.h>
#include<time.h>

void header(int);
int login(int);
void footer();
void menu();
void showtime();
void admin_menu();
int admin_ctrl(int);
int init_all(int);
void logged_off();
char convert(char []);
int new_product_main(int);
void all_product_main(int);							// ALL PRODUCT DATA
int search_product_main(int&);						// SEARCH PRODUCT DATA
int delete_product_main(int);						// DELETE PRODUCT DATA
int edit_product_main(int&);						// EDIT PRODUCT DATA
int billing_main(int);
int parental_ctrl();
int sales_history();
int invoice_history();

char username[20];									//
char password[20];									//  
int invoice=1;										//


//<||===========CLASS DEFINITION===========||>
class product
{
private:
	void convert(char []);
protected:
public:
	float price;
	char barcode[20];
	char prod_name[50];
	int enter_data(int,int);
	int enter_data(int,char []);							// FOR JUMPING FROM SEARCH AND EDIT
	void show_data();
	int edit_data(char[],int,int);
	float give_price(int qty=1)
	{
		return qty*price;
	}
	int scan(char [],int);
	product()
	{
		strcpy(barcode,"0000");
		strcpy(prod_name,"");
		price=0.0;
	}
};

class sales:public product
{
private:
	void convert(char []);
public:
	struct item_list
	{
		char item_bc[20];
		char item_name[50];
		float item_rate;
		int qty;
		float tot_prc_item;
	};
	item_list item[150];
	int invoice_no;
	int new_bill(int);
	float total_bill;
	void show_item(item_list,int);
	int item_ctr;
	float discount;
	float net_total;

};
//<||===========CLASS DEFINITION END===========||>

//<||===========CREATE OBJECT===========||>
product prod[500];
product try_prod[500];
sales sale[500];
//<||===========CREATE OBJECT END===========||>

int product::enter_data(int i,int times)
{
	int flag=0;
	char temp_price[10];
	do
	{
BARCODE:
		header(1);
		cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t-----------------"<<endl<<endl;
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		if(!flag&&times==1)
			cout<<"\t\t\t\t\t\t          HIT \'0\' TO GO BACK <<";
		if(!flag&&times!=1)
			cout<<"\t\t\t\t\t\t      HIT \'0\' TO SAVE & EXIT <<";
		if(flag==1&&times!=1)
			cout<<"!!.....|| BARCODE EXISTS ||.....!!\t\t      HIT \'0\' TO SAVE & EXIT <<";
		if(flag==1&&times==1)
			cout<<"!!.....|| BARCODE EXISTS ||.....!!\t\t          HIT \'0\' TO GO BACK <<";
		if(flag==2&&times==1)
			cout<<"!!.....|| ENTER THE ITEM BARCODE ||.....!!\t\t  HIT \'0\' TO GO BACK <<";
		if(flag==2&&times!=1)
			cout<<"!!.....|| ENTER THE ITEM BARCODE ||.....!!\t      HIT \'0\' TO SAVE & EXIT <<";
		if(flag==3&&times==1)
			cout<<"!!.....|| INVALID BARCODE ||.....!!\t\t          HIT \'0\' TO GO BACK <<";
		if(flag==3&&times!=1)
			cout<<"!!.....|| INVALID BARCODE ||.....!!\t\t      HIT \'0\' TO SAVE & EXIT <<";
		cout<<"\n\n";
		cout<<i<<"."<<'\t';
		cin.getline(barcode,20);
		convert("barcode");									//CONVERT TO CAPITAL
		flag=0;
		if(!strcmp(barcode,""))
			flag=2;
		if(flag!=2)
			flag=scan("barcode",i);							//CHECKING BARCODE REPTITION
		if(strlen(barcode)>15)
			flag=3;
		if(!strcmp(barcode,"0"))							//EXIT
		{
			if(times!=1)
			{
				header(1);
				cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
				cout<<"\t\t\t\t-----------------"<<endl<<endl;
				cout<<"\n\n";
				cout<<"--------------------------------------------------------------------------------"<<endl;
				cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
				cout<<"--------------------------------------------------------------------------------"<<endl;
				cout<<"\n\n";
				cout<<" >> SAVING DATA...."<<endl;
				for(i=0;i<=700000000;i++);
			}
			return 0;
		}
	}while(flag);
PRODUCT:
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t-----------------"<<endl<<endl;
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		if(!flag)
			cout<<"\t\t\t\t\t\t     HIT \'0\' TO EDIT BARCODE <<";
		if(flag==1)
			cout<<"!!.....|| ENTER THE PRODUCT NAME ||.....!!\t     HIT \'0\' TO EDIT BARCODE <<";
		if(flag==2&&flag!=1)
			cout<<"!!.....|| ATLEAST 1 ALPHABET REQD. ||.....!!\t     HIT \'0\' TO EDIT BARCODE <<";
		if(flag==3&&flag!=2&&flag!=1)
			cout<<"!!.....|| PRODUCT NAME EXISTS ||.....!!\t\t     HIT \'0\' TO EDIT BARCODE <<";
		if(flag==4&&flag!=3&&flag!=2&&flag!=1)
			cout<<"!!.....|| PRODUCT NAME TOO LONG ||.....!!\t     HIT \'0\' TO EDIT BARCODE <<";
		flag=0;
		cout<<"\n\n";
		if(strlen(barcode)>=8)
			cout<<i<<"."<<'\t'<<barcode<<"\t\t";
		else
			cout<<i<<"."<<'\t'<<barcode<<"\t\t\t";
		cin.getline(prod_name,50);
		if(!strcmp(prod_name,""))
			flag=1;
		if(strlen(prod_name)>40)
		{
			flag=4;
		}
		if(flag!=1&&flag!=4)
			flag=scan(prod_name,-1);						//ONLY DIGITS ??
		convert("prod_name");								//CONVERT TO CAPITAL
		if(i!=1)
		{
			for(int num=1;num<i;++num)
			{
				if(!strcmp(prod[num].prod_name,prod[i].prod_name))
				{
					flag=3;
					break;
				}
			}
		}
	}while(flag);
	flag=0;
	if(!strcmp(prod_name,"0"))
		goto BARCODE;
	do
	{
		header(1);
		cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t-----------------"<<endl<<endl;
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		if(!flag)
			cout<<"\t\t\t\t\t        HIT \'0\' TO EDIT PRODUCT NAME <<";
		if(flag==2)
			cout<<"!!.....|| ENTER THE PRODUCT PRICE ||.....!!     HIT \'0\' TO EDIT PRODUCT NAME <<";
		if(flag==1)
			cout<<"!.....INVALID PRICE.....!\t\t\tHIT \'0\' TO EDIT PRODUCT NAME <<";
		flag=0;
		cout<<"\n\n";
		if(strlen(barcode)>=8)
		{
			if(strlen(prod_name)>30)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<endl<<"\t\t\t\t\t\t\t\t";
			else if(strlen(prod_name)>=24)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t";
			else if(strlen(prod_name)>=16)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t";
			else if(strlen(prod_name)>=8)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t\t";
			else
				cout<<i<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t\t\t";
		}
		else
		{
			if(strlen(prod_name)>30)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<endl<<"\t\t\t\t\t\t\t\t";
			else if(strlen(prod_name)>=24)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t";
			else if(strlen(prod_name)>=16)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t";
			else if(strlen(prod_name)>=8)
				cout<<i<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t\t";
			else
				cout<<i<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t\t\t";
		}
		cout<<"SR ";
		cin.getline(temp_price,10);
		flag=scan(temp_price,0);									//CHECKING FOR ALPHABET IN 'PRICE'
		convert(temp_price);
		if(!strcmp(temp_price,""))
			flag=2;
		if(!strcmp(temp_price,"0"))
		{
			goto PRODUCT;
		}
	}while(flag);
	price=atof(temp_price);
	return 1;
}

int product::enter_data(int sno,char bc[])
{
	int flag=0,i=0;
	char temp_price[10];
	strcpy(barcode,bc);
PRODUCT:
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t-----------------"<<endl<<endl;
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		if(!flag)
			cout<<"\t\t\t\t\t\t          HIT \'0\' TO GO BACK <<";
		if(flag==1)
			cout<<"!!.....|| ENTER THE PRODUCT NAME ||.....!!\t          HIT \'0\' TO GO BACK <<";
		if(flag==2&&flag!=1)
			cout<<"!!.....|| ATLEAST 1 ALPHABET REQD. ||.....!!\t             HIT \'0\' GO BACK <<";
		if(flag==3&&flag!=2&&flag!=1)
			cout<<"!!.....|| PRODUCT NAME EXISTS ||.....!!\t\t          HIT \'0\' TO GO BACK <<";
		if(flag==4&&flag!=3&&flag!=2&&flag!=1)
			cout<<"!!.....|| PRODUCT NAME TOO LONG ||.....!!\t          HIT \'0\' TO GO BACK <<";
		flag=0;
		cout<<"\n\n";
		if(strlen(barcode)>=8)
			cout<<sno<<"."<<'\t'<<barcode<<"\t\t";
		else
			cout<<sno<<"."<<'\t'<<barcode<<"\t\t\t";
		cin.getline(prod_name,50);
		if(!strcmp(prod_name,""))
			flag=1;
		if(strlen(prod_name)>40)
		{
			flag=4;
		}
		if(flag!=1&&flag!=4)
			flag=scan(prod_name,-1);						//ONLY DIGITS ??
		convert("prod_name");								//CONVERT TO CAPITAL
		if(sno!=1)
		{
			for(int num=1;num<sno;++num)
			{
				if(!strcmp(prod[num].prod_name,prod[sno].prod_name))
				{
					flag=3;
					break;
				}
			}
		}
	}while(flag);
	flag=0;
	if(!strcmp(prod_name,"0"))
		return 0;
	do
	{
		header(1);
		cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t-----------------"<<endl<<endl;
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		if(!flag)
			cout<<"\t\t\t\t\t        HIT \'0\' TO EDIT PRODUCT NAME <<";
		if(flag==2)
			cout<<"!!.....|| ENTER THE PRODUCT PRICE ||.....!!     HIT \'0\' TO EDIT PRODUCT NAME <<";
		if(flag==1)
			cout<<"!.....INVALID PRICE.....!\t\t\tHIT \'0\' TO EDIT PRODUCT NAME <<";
		flag=0;
		cout<<"\n\n";
		if(strlen(barcode)>=8)
		{
			if(strlen(prod_name)>30)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<endl<<"\t\t\t\t\t\t\t\t";
			else if(strlen(prod_name)>=24)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t";
			else if(strlen(prod_name)>=16)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t";
			else if(strlen(prod_name)>=8)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t\t";
			else
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t\t\t";
		}
		else
		{
			if(strlen(prod_name)>30)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<endl<<"\t\t\t\t\t\t\t\t";
			else if(strlen(prod_name)>=24)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t";
			else if(strlen(prod_name)>=16)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t";
			else if(strlen(prod_name)>=8)
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t\t";
			else
				cout<<sno<<"."<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t\t\t";
		}
		cout<<"SR ";
		cin.getline(temp_price,10);
		flag=scan(temp_price,0);									//CHECKING FOR ALPHABET IN 'PRICE'
		convert(temp_price);
		if(!strcmp(temp_price,""))
			flag=2;
		if(!strcmp(temp_price,"0"))
		{
			goto PRODUCT;
		}
	}while(flag);
	price=atof(temp_price);
	header(1);
	cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
	cout<<"\t\t\t\t-----------------"<<endl<<endl;
	cout<<"\n\n";
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"\n\n";
	cout<<" >> SAVING DATA...."<<endl;
	for(i=0;i<=700000000;i++);
	return 1;
}

void product::convert(char check[])
{
	int i=0;
	if(!strcmp(check,"barcode"))
	{
		for(i=0;barcode[i]!='\0';++i)
			barcode[i]=toupper(barcode[i]);
	}
	if(!strcmp(check,"prod_name"))
	{
		for(i=0;prod_name[i]!='\0';++i)
			prod_name[i]=toupper(prod_name[i]);
	}
}

int product::scan(char check[],int num)
{
	int i=0,dot=0,alpha=0;
	if(!strcmp(check,"barcode"))							//CHECKING BARCODE REPITITION
	{
		for(i=0;i<num;++i)
		{
			if(!strcmp(prod[num].barcode,prod[i].barcode))
				return 1;
		}
	}
	if(!strcmp(check,"product"))
	{
		for(i=1;i<num;++i)
		{
			if(!strcmp(prod[num].prod_name,prod[i].prod_name))
				return 3;
		}
	}
	if(num==-1)												//CHECKING PRODUCT NAME IS GENIUNE || !
	{
		if(!strcmp(check,"0"))
		{
			return 0;
		}
		for(i=0;check[i]!='\0';++i)
		{
			if(isalpha(check[i]))
				return 0;
		}
		return 2;
	}
	if(strcmp(check,"barcode"))								//CHECKING PRICE IS GENUINE || !
	{
		for(i=0;check[i]!='\0';++i)
		{
			if(isalpha(check[i]))
				return 1;
			if(!isdigit(check[i])&&check[i]!='.')
				return 1;
			if(check[i]=='.')
				++dot;
			if(dot>1)
				return 1;
		}
	}
	return 0;
}

void product::show_data()
{
	if(strlen(barcode)>=8)
	{
		if(strlen(prod_name)>30)
			cout<<'\t'<<barcode<<"\t\t"<<prod_name<<endl<<"\t\t\t\t\t\t\t\t"<<price<<" SR";
		else if(strlen(prod_name)>=24)
			cout<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t"<<price<<" SR";
		else if(strlen(prod_name)>=16)
			cout<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t"<<price<<" SR";
		else if(strlen(prod_name)>=8)
			cout<<'\t'<<setw(3)<<barcode<<"\t\t"<<prod_name<<"\t\t\t"<<price<<" SR";
		else
			cout<<'\t'<<barcode<<"\t\t"<<prod_name<<"\t\t\t\t"<<price<<" SR";
	}
	else
	{
		if(strlen(prod_name)>30)
			cout<<'\t'<<barcode<<"\t\t\t"<<prod_name<<endl<<"\t\t\t\t\t\t\t\t"<<price<<" SR";
		else if(strlen(prod_name)>=24)
			cout<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t"<<price<<" SR";
		else if(strlen(prod_name)>=16)
			cout<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t"<<price<<" SR";
		else if(strlen(prod_name)>=8)
			cout<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t\t"<<price<<" SR";
		else
			cout<<'\t'<<barcode<<"\t\t\t"<<prod_name<<"\t\t\t\t"<<price<<" SR";
	}	
}

int product::edit_data(char choice[],int sno,int post)
{
	if(!strcmp(choice,"barcode"))
	{
EDIT_BARCODE:
		int flag=0,i=0;
		char new_barcode[20],choice[5],news[150]="ITEM EDITED";
		do
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                -----------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"     OLD BARCODE : "<<barcode<<endl;
			cout<<"     NEW BARCODE : "<<""<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			if(!flag||flag==2)
				cout<<"!!.....|| ENTER NEW BARCODE ||.....!!\t\t\t  HIT \'0\' TO GO BACK <<";			
			if(flag==1)
				cout<<"!!.....|| BARCODE EXISTS ||.....!!\t\t\t  HIT \'0\' TO GO BACK <<";
			flag=0;
			cout<<"\n\n";
			cout<<"     ";
			cin.getline(new_barcode,20);
			if(!strcmp(new_barcode,""))
				flag=2;
			if(!strcmp(new_barcode,"0"))
			{
				return 0;
			}
			if(flag!=2)
			{
				for(i=0;new_barcode[i]!='\0';++i)
					new_barcode[i]=toupper(new_barcode[i]);			//CONVERT TO CAPITAL
				for(i=0;i<sno;++i)
				{
					if(i!=post)
						if(!strcmp(new_barcode,prod[i].barcode))
							flag=1;
						
				}													//CHECKING BARCODE REPTITION
			}
		}while(flag);
		flag=0;
		do
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"     OLD BARCODE : "<<barcode<<endl;
			cout<<"     NEW BARCODE : "<<new_barcode<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\n\n";
			cout<<"     Are You SURE To Change The BARCODE Of This Item ?       >> Y : YES"<<endl<<endl;
			cout<<"                                                             >> N : NO"<<endl<<endl; 
			cout<<"                                                             >> G : GO BACK"<<endl; 
			cout<<"\n";
			if(flag==1)
				cout<<"                                        !.....ENTER Y / N / G.....!";
			if(flag==2)
				cout<<"                                         !.....INVALID CHOICE.....!";
			cout<<"\n\n";
			flag=0;
			cout<<"                                                Enter Your CHOICE : ";
			cin.getline(choice,5);		
			if(!strcmp(choice,""))
				flag=1;
			if(flag!=1)
				if(strcmpi(choice,"Y")&&strcmpi(choice,"N")&&strcmpi(choice,"G"))
					flag=2;
		}while(flag);
		if(!strcmpi(choice,"G"))
		{
			goto EDIT_BARCODE;
		}
		if(!strcmpi(choice,"N"))
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"            		  !.....|| BARCODE NOT CHANGED ||.....!"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\nHit ENTER To Continue...";
			cin.get();
			return 0;
		}
		if(!strcmpi(choice,"Y"))
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			strcpy(barcode,new_barcode);
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"		                CHANGING BARCODE......"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			for(i=0;i<=700000000;i++);
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"                !.....|| BARCODE CHANGED SUCCESSFULLY ||.....!"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\nHit ENTER To Continue...";
			cin.get();
			return 0;
		}
	}
	if(!strcmp(choice,"product"))
	{
EDIT_PRODUCT_NAME:
		int flag=0,i=0;
		char new_name[50],choice[5];
		do
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                -----------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"     OLD NAME : "<<prod_name<<endl;
			cout<<"     NEW NAME : "<<""<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			if(!flag||flag==1)
				cout<<"!!.....|| ENTER NEW PRODUCT NAME ||.....!!\t\t  HIT \'0\' TO GO BACK <<";
			if(flag==2&&flag!=1)
				cout<<"!!.....|| ATLEAST 1 ALPHABET REQD. ||.....!!\t\t  HIT \'0\' TO GO BACK <<";
			if(flag==3&&flag!=2&&flag!=1)
				cout<<"!!.....|| PRODUCT NAME EXISTS ||.....!!\t\t\t  HIT \'0\' TO GO BACK <<";
			if(flag==4&&flag!=3&&flag!=2&&flag!=1)
				cout<<"!!.....|| PRODUCT NAME TOO LONG ||.....!!\t     HIT \'0\' TO EDIT BARCODE <<";
			flag=0;
			cout<<"\n\n";
			cout<<"     ";
			cin.getline(new_name,50);
			if(!strcmp(new_name,""))
				flag=1;
			if(!strcmp(new_name,"0"))
			{
				return 0;
			}
			if(strlen(new_name)>40)
			{
				flag=4;
			}
			for(i=0;new_name[i]!='\0';++i)
				new_name[i]=toupper(new_name[i]);			//CONVERT TO CAPITAL
			if(flag!=1&&flag!=4)
				flag=scan(new_name,-1);
			for(i=1;i<sno;++i)
			{
				if(i!=post)
					if(!strcmp(new_name,prod[i].prod_name))
					{
						flag=3;
						break;
					}
			}
		}while(flag);
		flag=0;
		do
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"     OLD NAME : "<<prod_name<<endl;
			cout<<"     NEW NAME : "<<new_name<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\n\n";
			cout<<"     Are You SURE To Change The NAME Of This Item ?          >> Y : YES"<<endl<<endl;
			cout<<"                                                             >> N : NO"<<endl<<endl; 
			cout<<"                                                             >> G : GO BACK"<<endl; 
			cout<<"\n";
			if(flag==1)
				cout<<"                                        !.....ENTER Y / N / G.....!";
			if(flag==2)
				cout<<"                                         !.....INVALID CHOICE.....!";
			cout<<"\n\n";
			flag=0;
			cout<<"                                                Enter Your CHOICE : ";
			cin.getline(choice,5);		
			if(!strcmp(choice,""))
				flag=1;
			if(flag!=1)
				if(strcmpi(choice,"Y")&&strcmpi(choice,"N")&&strcmpi(choice,"G"))
					flag=2;
		}while(flag);
		if(!strcmpi(choice,"G"))
		{
			goto EDIT_PRODUCT_NAME;
		}
		if(!strcmpi(choice,"N"))
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"            	    !.....|| PRODUCT NAME NOT CHANGED ||.....!"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\nHit ENTER To Continue...";
			cin.get();
			return 0;
		}
		if(!strcmpi(choice,"Y"))
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			strcpy(prod_name,new_name);
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"		             CHANGING PRODUCT NAME......"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			for(i=0;i<=700000000;i++);
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"                !.....|| PRODUCT NAME CHANGED SUCCESSFULLY ||.....!"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\nHit ENTER To Continue...";
			cin.get();
			return 0;
		}
	}
	if(!strcmp(choice,"price"))
	{
EDIT_PRODUCT_PRICE:
		int flag=0,i=0;
		char temp_price[10],choice[5];
		do
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                -----------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"     OLD PRICE : "<<give_price()<<" SR"<<endl;
			cout<<"     NEW PRICE : "<<""<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			if(!flag||flag==2)
				cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
			if(flag==1)
				cout<<"!.....INVALID PRICE.....!\t\t\t\t  HIT \'0\' TO GO BACK <<";
			flag=0;
			cout<<"\n\n";
			cout<<"     ";
			cin.getline(temp_price,10);
			flag=scan(temp_price,0);									//CHECKING FOR ALPHABET IN 'PRICE'
			convert(temp_price);
			if(!strcmp(temp_price,""))
				flag=2;
			if(!strcmp(temp_price,"0"))
				return 0;
		}while(flag);
		flag=0;
		do
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"     OLD PRICE : "<<give_price()<<" SR"<<endl;
			cout<<"     NEW PRICE : "<<temp_price<<" SR"<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\n\n";
			cout<<"     Are You SURE To Change The PRICE Of This Item ?         >> Y : YES"<<endl<<endl;
			cout<<"                                                             >> N : NO"<<endl<<endl; 
			cout<<"                                                             >> G : GO BACK"<<endl; 
			cout<<"\n";
			if(flag==1)
				cout<<"                                        !.....ENTER Y / N / G.....!";
			if(flag==2)
				cout<<"                                         !.....INVALID CHOICE.....!";
			cout<<"\n\n";
			flag=0;
			cout<<"                                                Enter Your CHOICE : ";
			cin.getline(choice,5);		
			if(!strcmp(choice,""))
				flag=1;
			if(flag!=1)
				if(strcmpi(choice,"Y")&&strcmpi(choice,"N")&&strcmpi(choice,"G"))
					flag=2;
		}while(flag);
		if(!strcmpi(choice,"G"))
		{
			goto EDIT_PRODUCT_PRICE;
		}
		if(!strcmpi(choice,"N"))
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"            	    !.....|| PRODUCT PRICE NOT CHANGED ||.....!"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\nHit ENTER To Continue...";
			cin.get();
			return 0;
		}
		if(!strcmpi(choice,"Y"))
		{
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			price=atof(temp_price);
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"		            CHANGING PRODUCT PRICE......"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			for(i=0;i<=700000000;i++);
			header(1);
			cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
			cout<<"\t\t\t\t------------------"<<endl<<endl;
			cout<<"\n";
			cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
			cout<<"                                                                   --------"<<endl;
			cout<<"\n\n";
			cout<<"\n\n";
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"                !.....|| PRODUCT PRICE CHANGED SUCCESSFULLY ||.....!"<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\nHit ENTER To Continue...";
			cin.get();
			return 0;
		}
	}
	return 1;
}

int sales::new_bill(int sno)
{
	int srl=1,i=0,flag=0,j=0,k=0,z=0;
	float disc=0.0;
	char temp_qty[6],choice[5],temp_dsc[10],temp_cash[10];
	total_bill=0.0;
ENTER_BC_BILL:
	flag=0;
	do
	{
		if(flag==12)
			flag=0;
		if(srl>1)
		{
			total_bill=0.0;
			for(k=1;k<srl;++k)
				total_bill+=item[k].tot_prc_item;
		}
		header(1);
		cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
		cout<<"\t\t\t\t  ---------------"<<endl<<endl;
		cout<<"\n";
		cout<<" >> INVOICE NUMBER : "<<::invoice<<"\t\t\t\t\t"<<"    "<<total_bill<<" SR"<<setw(10)<<"TOTAL <<";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		if(!flag&&srl==1)
			cout<<"\t\t\t\t\t\t          HIT \'0\' TO GO BACK <<";
		if(!flag&&srl>1)
		{
			cout<<" >> HIT \'0\' TO EDIT PREVIOUS ITEM\t\t    HIT \'ENTER\' TO CHECK OUT <<";
		}
		if(flag==1)
			cout<<"!!.....|| ENTER BARCODE ||.....!!\t\t          HIT \'0\' TO GO BACK <<";
		if(flag==2&&srl==1)
			cout<<"!!.....|| INVALID BARCODE ||.....!!\t\t          HIT \'0\' TO GO BACK <<";
		if(flag==2&&srl>1)
			cout<<"!!.....|| INVALID BARCODE ||.....!!\t\t    HIT \'ENTER\' TO CHECK OUT <<";
		cout<<"\n\n";
		flag=0;
		if(srl>1)
		{
			for(k=1;k<srl;++k)
			{
				cout<<k<<".";show_item(item[k],1);
			}

		}
		cout<<srl<<"."<<'\t';
		cin.getline(item[srl].item_bc,20);
		if(!strcmp(item[srl].item_bc,"0")&&srl==1)
			break;
		if(!strcmp(item[srl].item_bc,"0")&&srl>1)
		{
			--srl;
			goto ENTER_BC_BILL;
		}
		if(!strcmp(item[srl].item_bc,"")&&srl==1)
			flag=1;
		if(!strcmp(item[srl].item_bc,"")&&srl>1)
			break;
		if(flag!=1)
		{
			for(i=1;i<sno;++i)
			{
				if(!strcmpi(item[srl].item_bc,prod[i].barcode))
				{
					flag=5;
					strcpy(item[srl].item_name,prod[i].prod_name);

					item[srl].item_rate=prod[i].give_price();
					item[srl].item_bc[7]='\0';
					for(k=0;item[srl].item_bc[k]!='\0';++k)
						item[srl].item_bc[k]=toupper(item[srl].item_bc[k]);
					break;
				}
				else
					flag=2;
			}
		}
		if(flag==5)
		{
			flag=0;
			do
			{
				header(1);
				cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
				cout<<"\t\t\t\t  ---------------"<<endl<<endl;
				cout<<"\n";
				cout<<" >> INVOICE NUMBER : "<<::invoice<<"\t\t\t\t\t"<<"    "<<total_bill<<" SR"<<setw(10)<<"TOTAL <<";
				cout<<"\n\n";
				cout<<"--------------------------------------------------------------------------------"<<endl;
				cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
				cout<<"--------------------------------------------------------------------------------"<<endl;
				if(!flag)
					cout<<"\t\t\t\t\t\t          HIT \'0\' TO GO BACK <<";
				if(flag==5)
					cout<<"!!.....|| ENTER QUANTITY ||.....!!\t\t          HIT \'0\' TO GO BACK <<";
				if(flag==6)
					cout<<"!!.....|| INVALID QUANTITY ||.....!!\t\t\t  HIT \'0\' TO GO BACK <<";
				flag=0;
				cout<<"\n\n";	
				if(srl>1)
				{
					for(k=1;k<srl;++k)
					{
						cout<<k<<".";show_item(item[k],1);
					}
				}
				cout<<srl<<".";show_item(item[srl],0);
				cin.getline(temp_qty,6);
				if(!strcmp(temp_qty,""))
					flag=5;
				if(!strcmp(temp_qty,"0"))
					goto ENTER_BC_BILL;
				if(flag!=5)
				{
					for(j=0;temp_qty[j]!='\0';++j)
					{
						if(!isdigit(temp_qty[j]))
						{
							flag=6;
							break;
						}
					}
				}
				if(flag==0)
				{
					if(srl!=1)
					{
						for(z=1;z<srl;z++)
						{
							if(!strcmp(item[z].item_bc,item[srl].item_bc))
							{
								item[z].qty+=atoi(temp_qty);
								item[z].tot_prc_item=item[z].qty*item[z].item_rate;
								flag=2;
								--srl;
							}
						}
					}
					if(flag!=2)
					{
						item[srl].qty=atoi(temp_qty);
						item[srl].tot_prc_item=item[srl].qty*item[srl].item_rate;
					}
					flag=0;
				}
			}while(flag);
			flag=12;
			++srl;
		}
	}while(flag);
		item_ctr=(srl-1);
	if(!strcmp(item[srl].item_bc,"0"))
		return 0;
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
		cout<<"\t\t\t\t  ---------------"<<endl<<endl;
		cout<<"\n";
		cout<<" >> INVOICE NUMBER : "<<::invoice<<"\t\t\t\t\t"<<"    "<<total_bill<<" SR"<<setw(10)<<"TOTAL <<";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\n";
		if(srl>1)
		{
			for(k=1;k<srl;++k)
			{
				cout<<k<<".";show_item(item[k],1);
				
			}

		}
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\n\n";
		cout<<"                 Are You SURE To CHECK OUT ?       >> ENTER : YES"<<endl<<endl;
		cout<<"                                                   >>     N : NO "<<endl<<endl; 
		cout<<"                                                   >>     C : CANCEL INVOICE"<<endl; 
		cout<<"\n";
		if(flag==2)
		cout<<"                                   !.....INVALID CHOICE.....!";
		flag=0;
		cout<<"\n\n";
		cout<<"                                          Enter Your CHOICE : ";
		cin.getline(choice,5);		
		if(!strcmp(choice,""))
			break;
		if(!strcmpi(choice,"C"))
			return 0;
		if(!strcmpi(choice,"N"))
			goto ENTER_BC_BILL;
		if(strcmpi(choice,"N")&&strcmpi(choice,"C"))
			flag=2;
	}while(flag);
	flag=0;
	int dot=0;
	do
	{
		header(1);
		cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
		cout<<"\t\t\t\t  ---------------"<<endl<<endl;
		cout<<"\n";
		cout<<" >> INVOICE NUMBER : "<<::invoice<<"\t\t\t\t\t";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\n";
		if(srl>1)
		{
			for(k=1;k<srl;++k)
			{
				cout<<k<<".";show_item(item[k],1);
				
			}

		}
		cout<<"--------------------------------------------------------------------------------"<<endl;
			cout<<"\t\t\t\t\t\t ";cout<<" >> TOTAL      : "<<total_bill<<" SR"<<endl;
		dot=0;
		cout<<"\n";
		if(flag==1)
		{	cout<<"\t\t\t\t     ";cout<<"!....INVALID DISCOUNT....!";}
		if(flag==2)
		{	cout<<"\t\t     ";cout<<"!....DISCOUNT SHOULD NOT EXCEED 7.5% OF TOTAL....!";}
		flag=0;
		cout<<"\n\n";
		if(total_bill<=100)
		{
			discount=0.00;
			cout<<"\t\t\t\t\t\t ";cout<<" >> DISCOUNT   : "<<discount<<" SR"<<endl;
		}
		else
		{
			cout<<"\t\t\t\t\t\t ";cout<<" >> DISCOUNT   : ";
			cin.getline(temp_dsc,10);
			if(!strcmp(temp_dsc,""))
			{
				discount=0.0;
				break;
			}
			for(k=0;temp_dsc[k]!='\0';++k)
			{
				if(isalpha(temp_dsc[k]))
				{
					flag=1;
					break;
				}
				if(!isdigit(temp_dsc[k])&&temp_dsc[k]!='.')
				{
					flag=1;
					break;
				}
				if(temp_dsc[k]=='.')
					++dot;
				if(dot>1)
				{
					flag=1;
					break;
				}
			}
		}
		if(atof(temp_dsc)>0.075*total_bill)
			flag=2;
	}while(flag);
	discount=atof(temp_dsc);
	net_total=total_bill-discount;
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
		cout<<"\t\t\t\t  ---------------"<<endl<<endl;
		cout<<"\n";
		cout<<" >> INVOICE NUMBER : "<<::invoice<<"\t\t\t\t\t";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\n";
		if(srl>1)
		{
			for(k=1;k<srl;++k)
			{
				cout<<k<<".";show_item(item[k],1);
				
			}

		}
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> TOTAL      : "<<total_bill<<" SR"<<endl<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> DISCOUNT   : "<<discount<<" SR"<<endl<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> NET TOTAL  : "<<net_total<<" SR"<<endl<<endl;
		cout<<"\n";
		if(flag==1)
			cout<<"\t\t\t\t\t   !....INVALID AMOUNT....!";
		if(flag==2)
			cout<<"\t\t\t\t\t!....ENTER AMOUNT PAID....!";
		if(flag==3)
			cout<<"\t\t\t\t\t!....AMOUNT LESS THAN TOTAL....!";
		flag=0;dot=0;
		cout<<"\n\n";
		cout<<"\t\t\t\t\t\t ";cout<<" >> CASH       : ";
		cin.getline(temp_cash,10);
		if(!strcmp(temp_cash,""))
			flag=2;
		if(flag!=2)
		{
			for(k=0;temp_cash[k]!='\0';++k)
			{
				if(isalpha(temp_cash[k]))
				{
					flag=1;
					break;
				}
				if(!isdigit(temp_cash[k])&&temp_cash[k]!='.')
				{
					flag=1;
					break;
				}
				if(temp_cash[k]=='.')
					++dot;
				if(dot>1)
				{
					flag=1;
					break;
				}
			}
		}
		if(!flag)
		{
			if(atof(temp_cash)<net_total)
				flag=3;
		}
	}while(flag);
		header(1);
		cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
		cout<<"\t\t\t\t  ---------------"<<endl<<endl;
		cout<<"\n";
		cout<<" >> INVOICE NUMBER : "<<::invoice<<"\t\t\t\t\t";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\n";
		if(srl>1)
		{
			for(k=1;k<srl;++k)
			{
				cout<<k<<".";show_item(item[k],1);
				
			}

		}
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> TOTAL      : "<<total_bill<<" SR"<<endl<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> DISCOUNT   : "<<discount<<" SR"<<endl<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> NET TOTAL  : "<<net_total<<" SR"<<endl<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> CASH       : "<<temp_cash<<" SR"<<endl<<endl;
		cout<<"\t\t\t\t\t\t ";cout<<" >> CHANGE     : "<<atof(temp_cash)-net_total<<" SR"<<endl<<endl;
		cout<<"================================================================================"<<endl;
		cout<<"                 *** THANKS FOR SHOPPING WITH AMASI SUPERMARKET ***             "<<endl;
		cout<<"================================================================================"<<endl;
		cin.get();

}

void sales::show_item(item_list item,int s=1)
{
	if(s==1)
	{
		if(strlen(item.item_name)>=24)
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t"<<item.item_rate<<" SR"<<'\t'<<item.qty<<'\t'<<item.tot_prc_item<<" SR"<<endl<<endl;
		else if(strlen(item.item_name)>=16)
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t\t"<<item.item_rate<<" SR"<<'\t'<<item.qty<<'\t'<<item.tot_prc_item<<" SR"<<endl<<endl;
		else if(strlen(item.item_name)>=8)
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t\t\t"<<item.item_rate<<" SR"<<'\t'<<item.qty<<'\t'<<item.tot_prc_item<<" SR"<<endl<<endl;
		else
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t\t\t\t"<<item.item_rate<<" SR"<<'\t'<<item.qty<<'\t'<<item.tot_prc_item<<" SR"<<endl<<endl;
	}
	if(s==0)
	{
		if(strlen(item.item_name)>=24)
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t"<<item.item_rate<<" SR"<<'\t';
		else if(strlen(item.item_name)>=16)
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t\t"<<item.item_rate<<" SR"<<'\t';
		else if(strlen(item.item_name)>=8)
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t\t\t"<<item.item_rate<<" SR"<<'\t';
		else
			cout<<'\t'<<item.item_bc<<"\t\t"<<item.item_name<<"\t\t\t\t"<<item.item_rate<<" SR"<<'\t';
	}

}

void main()
{
	//<||===========VARIABLE DECLARATIONS===========||>
	int i=0,total=0,flag=0,go=0,sno=1;
	char menuchoice[5],temp_user[20],temp_pwd[20],temp_sno[5];
	char temp[10];
	//<||===========VARIABLE DECLARATIONS OVER===========||>
	fstream fin;
	fstream dataread;
	fstream invoiceno;
	fstream getbillitems;
	fstream renew;
	fin.open("parental.txt",ios::in);					
	fin.getline(temp_user,20,'\n');						//
	fin.getline(temp_pwd,20,'\n');						//
	if(!strcmp(temp_user,"")&&!strcmp(temp_pwd,""))
	{
		strcpy(temp_user,"amasi");
		strcpy(temp_pwd,"amasi");
	}
	fin.close();										//   >> PARENTAL ACTIONS
	strcpy(::username,temp_user);						//
	strcpy(::password,temp_pwd);						//
	fstream serial;
	serial.open("serial.txt",ios::in);
	serial.getline(temp_sno,5);
	if(!strcmp(temp_sno,"")||!strcmp(temp_sno,"0"))
		strcpy(temp_sno,"1");
	serial.close();
	sno=atoi(temp_sno);
	dataread.open("dataitems.txt",ios::in);
	if(sno>1)
	{
		for(i=1;i<sno;++i)
		{
			dataread.getline(prod[i].barcode,20,'\n');
			dataread.getline(prod[i].prod_name,50,'\n');
			dataread.getline(temp,10,'\n');
			prod[i].price=atof(temp);
		}
	}
	dataread.close();
	invoiceno.open("invoice.txt",ios::in);
	invoiceno.getline(temp,10);
	invoiceno.close();
	if(!strcmp(temp,"")||!strcmp(temp,"0"))
		::invoice=1;
	else
		::invoice=atoi(temp);
	getbillitems.open("billitems.dat",ios::in|ios::binary);
	for(i=1;i<::invoice;++i)
	{
		getbillitems.read((char*)&sale[i],sizeof(sales));
	}
	getbillitems.close();
	header(0);
	//go=login(0);
	go=0;
	do
	{
		for(i=1;i<sno;++i)
			try_prod[i]=prod[i];
		renew.open("items.dat",ios::out|ios::binary);
		for(i=1;i<sno;++i)
		{
			renew.write((char*)&try_prod[i],sizeof(try_prod[i]));//truing to convert to binary file
		}

		renew.close();
		renew.open("items.dat",ios::in|ios::binary);
		for(i=1;i<sno;++i)
		{
			renew.read((char*)&try_prod[i],sizeof(try_prod[i]));//truing to convert to binary file
		}
		renew.close();
		do
		{
			menu();
			total=0;
			cout<<"\n";
			if(go==1)
				cout<<"!.....INVALID CHOICE.....!";
			if(go==2)
				cout<<"!.....PLEASE CREATE A DATA ENTRY BEFORE USING THIS OPTION.....!";
			if(go==4)
				cout<<"!.....NO SALES PERFORMED YET.....!";
			cout<<"\n\n";
			go=0;
			cout<<"Enter Your CHOICE : ";
			cin.getline(menuchoice,5);
		}while(!strcmp(menuchoice,""));
		for(i=0;menuchoice[i]!='\0';++i)
		{
			total+=menuchoice[i];
		}
		go=0;
		switch(total)
		{
		case 49:										//1. NEW PRODUCT
			sno=new_product_main(sno);
			break;
		case 50:										//2. EDIT PRODUCT
			if(sno==1)
			{
				go=2;
				break;
			}
			go=edit_product_main(sno);
			if(sno>1)
			{
				renew.open("dataitems.txt",ios::out);
				for(i=1;i<sno;++i)
				{
					renew<<prod[i].barcode<<'\n'<<prod[i].prod_name<<'\n'<<prod[i].price<<"\n";
				}
				renew.close();
			}
			if(sno==1)
			{
				renew.open("dataitems.txt",ios::out);
				renew.close();
			}
			break;
		case 51:										//3. ALL PRODUCT DATA
			if(sno==1)
			{
				go=2;
				break;
			}
			all_product_main(sno);
			break;
		case 52:										//4. SEARCH DATA
			if(sno==1)
			{
				go=2;
				break;
			}
			go=search_product_main(sno);
			renew.open("dataitems.txt",ios::out);
			for(i=1;i<sno;++i)
			{
				renew<<prod[i].barcode<<'\n'<<prod[i].prod_name<<'\n'<<prod[i].price<<"\n";
			}
			renew.close();
			break;
		case 53:										//5. DELETE DATA
			int temp;
			if(sno==1)
			{
				go=2;
				break;
			}
			temp=delete_product_main(sno);
			if(!temp)
			{
				go=3;
			}
			else
			{
				if(sno!=1)
					--sno;
			}
			if(sno>1)
			{
				renew.open("dataitems.txt",ios::out);
				for(i=1;i<sno;++i)
				{
					renew<<prod[i].barcode<<'\n'<<prod[i].prod_name<<'\n'<<prod[i].price<<"\n";
				}
				renew.close();
			}
			if(sno==1)
			{
				renew.open("dataitems.txt",ios::out);
				renew.close();
			}
			break;
		case 54:										//6. INVOICE & SALES
			if(sno==1)
			{
				go=2;
				break;
			}
			go=billing_main(sno);
			break;
		case 55:										//7. SALES HISTORY
			if(::invoice==1)
			{
				go=4;
				break;
			}
			sales_history();
			break;
		case 56:										//8. CHANGE USERNAME AND PASSWORD
			go=admin_ctrl(sno);
			break;
		case 57:										//10. LOG OFF 
			menu();
			cout<<"\n\n\n";
			cout<<"LOGGING OFF..."<<endl;
			for(i=0;i<=1000000000;i++);
			logged_off();
			cin.ignore();
			go=login(1);
			break;
		case 97:										//11. EXIT
			menu();
			cout<<"\n\n\n";
			cout<<"LOGGING OFF..."<<endl;
			for(i=0;i<=1000000000;i++);
			footer();
			break;
		default:
			go=1;
			break;
		}
		if(total!=97&&go==0&&go!=3)						//go=3 ---->> GO BACK TO MAIN MENU
		{
			cout<<"Hit ENTER To Continue .. ";
			if(cin.get()||!cin.get()){}
		}
	}while(go||!go);
}

void header(int s)
{
	system("title AMASI");
	system("cls");
	cout<<"\n\n";
	cout<<"\t\t\t  WELCOME TO SUPERMARKET DATABASE"<<endl;
	cout<<"\t\t\t *********************************"<<endl;
	if(s==1)
	{
		cout<<"\n";
		cout<<"\t\t\t     ======================="<<endl;
		cout<<"\t\t\t     || AMASI SUPERMARKET ||"<<endl;
		cout<<"\t\t\t     ======================="<<endl;
		cout<<"\n\n";
		showtime();										//DISPLAYS CURRENT DATE AND TIME
	}
}
void showtime()
{
	time_t t1 = time(0);   // get time now
	struct tm * now = localtime( & t1 );
	if(now->tm_hour<10)cout<<"0";
	cout << now->tm_hour << ":";
	if(now->tm_min<10)cout<<"0";
	cout<< now->tm_min << ":";
	if(now->tm_sec<10)cout<<"0";
	cout<< now->tm_sec;
	cout<<"\t\t\t\t\t\t\t     ";
	if(now->tm_mday<10)cout<<"0";
	cout <<  now->tm_mday << '-';
	if((now->tm_mon+1)<10)cout<<"0";
	cout << (now->tm_mon + 1) << '-'
		 << (now->tm_year + 1900) <<endl;
	cout<<"  ";
}

int login(int t)
{
	int flag=1,i=0;
	char usrnme[20],pwd[20];
	do
	{
		do{
			header(1);
			cout<<"\t\t\t!====AUNTHETICATION REQUIRED====!"<<endl;
			cout<<"\t\t\t---------------------------------"<<endl;
			if(t==0||t==1)
			cout<<"\t\t\t      >> TO EXIT HIT \'0\' <<"<<endl<<endl<<endl;
			else
			cout<<"\t\t\t    >> TO GO BACK HIT \'0\' <<"<<endl<<endl<<endl;
			if(flag)
				cout<<endl<<endl;
			if(!flag)											// ERROR MSG
			{
				cout<<"\t\t!!!!=====USERNAME & PASSWORD DOES NOT MATCH=====!!!!"<<endl<<endl;
			}
			cout<<" >> USERNAME             :       ";
			cin.getline(usrnme,20);
		}while(!strcmp(usrnme,""));
		if(!strcmp(usrnme,"0"))
		{										// TO EXIT
			if(t!=0&&t!=1)
				return 3;
			footer();
			break;
		}
		do
		{
			header(1);
			cout<<"\t\t\t!====AUNTHETICATION REQUIRED====!"<<endl;
			cout<<"\t\t\t---------------------------------"<<endl;
			if(t==0||t==1)
			cout<<"\t\t\t      >> TO EXIT HIT \'0\' <<"<<endl<<endl<<endl;
			else
			cout<<"\t\t\t    >> TO GO BACK HIT \'0\' <<"<<endl<<endl<<endl;
			if(flag)
				cout<<endl<<endl;
			cout<<" >> USERNAME             :       "<<usrnme;
			cout<<endl<<endl;
			cout<<" >> PASSWORD             :       ";
			cin.getline(pwd,20);
		}while(!strcmp(pwd,""));
		if(!strcmp(pwd,"0"))
		{										// TO EXIT
			if(t!=0&&t!=1)
				return 3;
			footer();
			break;
		}
		if(!strcmp(usrnme,::username)&&!strcmp(pwd,::password))
			flag=1;											// LOGIN SUCCESSFUL !!!
		else
			flag=0;											// LOGIN UNSUCCESSFUL !!!
	}while(!flag);
	header(1);
	cout<<"\t\t\t!!!!=====LOGIN SUCCESSFUL=====!!!!";
	if(t==0)
	{
		cout<<"\n\n PLEASE WAIT......"<<endl;
		for(i=0;i<=1000000000;i++);
		cout<<"\n >> MEMORY ALLOTMENT.............COMPLETED!!"<<endl;
		for(i=0;i<=1000000000;i++);
		cout<<"\n >> DATABASE INITIALIZATION......COMPLETED!!"<<endl;
		for(i=0;i<=1000000000;i++);
		cout<<"\n >> LOADING COMPLETE !!"<<endl;
		cout<<"\n\t\t     =======================================";
		cout<<"\n\t\t     ||      >> MAXIMISE THE WINDOW <<    ||";
		cout<<"\n\t\t     =======================================";
		cout<<"\n\n";
		cout<<"Hit ENTER To Continue .. ";
		if(cin.get()||!cin.get()){return 0;}
	}
	else if(t==1)
	{
		cout<<"\n\n\n >> STARTING FROM WHERE YOU LEFT OFF !!..."<<endl;
		for(i=0;i<=1000000000;i++);
	}
	else
	{		
		cout<<"\n\n\n >> AUTHENTICATING..."<<endl;
		for(i=0;i<=1000000000;i++);
	}
	cout<<endl<<endl;
}

char convert(char check[])
{
	int i=0;
	for(i=0;check[i]!='\0';++i)
		if(isalpha(check[i]))
			check[i]=toupper(check[i]);
	return check[20];
}

int new_product_main(int sno)
{
	int i=0,go=0,times=1;
	fstream serial;
	fstream data;
	if(sno==1)
	{
		data.open("dataitems.txt",ios::out);
		data.close();
	}
	data.open("dataitems.txt",ios::app);
	for(i=sno;i<=100;i++)
	{
		go=prod[i].enter_data(i,times);
		serial.open("serial.txt",ios::out);
		serial<<i<<endl;
		serial.close();
		++times;
		if(!go)
			break;
		data<<prod[i].barcode<<'\n'<<prod[i].prod_name<<'\n'<<prod[i].price<<"\n";
	}
	data.close();
	header(1);
	cout<<"\t\t\t\tNEW PRODUCT ENTRY"<<endl;
	cout<<"\t\t\t\t-----------------"<<endl<<endl;
	cout<<"\n\n";
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"\n\n";
	return i;
}

void all_product_main(int sno)
{
	int i=0;
	header(1);
	cout<<"\t\t\t\tALL PRODUCT ENTRIES"<<endl;
	cout<<"\t\t\t\t-------------------"<<endl<<endl;
	cout<<"\n\n";
	cout<<"================================================================================"<<endl;
	cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
	cout<<"================================================================================"<<endl;	
	for(i=1;i<sno;++i)
	{
		cout<<i<<".";
		prod[i].show_data();
		cout<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;	
		if(i==65)
		{
			cout<<"\nHit ENTER To VIEW MORE...";
			cin.get();
			header(1);
			cout<<"\t\t\t\tALL PRODUCT ENTRIES"<<endl;
			cout<<"\t\t\t\t-------------------"<<endl<<endl;
			cout<<"\n\n";
			cout<<"================================================================================"<<endl;
			cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
			cout<<"================================================================================"<<endl;	
		}
	}
}

int search_product_main(int &sno)
{
	int i=0,j=0,flag=0,go=0,size=0;
	char choice[5],prod_name[50],barcode[20],temp[20]="";
SEARCH_MENU:
	do
	{
		header(1);
		cout<<"\t\t\t\tSEARCH PRODUCT DATA"<<endl;
		cout<<"\t\t\t\t-------------------"<<endl<<endl;
		cout<<"\n";
		cout<<" >> 1. SEARCH BY BARCODE "<<endl;
		cout<<"\n";
		cout<<" >> 2. SEARCH BY PRODUCT NAME "<<endl;
		cout<<"\n";
		cout<<" >> 3. GO BACK TO MAIN MENU "<<endl;
		cout<<"\n";
		if(flag==2)
			cout<<"    !.....INVALID CHOICE.....!";
		cout<<"\n\n";
		flag=0;
		cout<<"    Enter Your CHOICE : ";
		cin.getline(choice,5);
		if(!strcmp(choice,""))
			flag=1;
		if((strcmp(choice,"1")&&strcmp(choice,"2")&&strcmp(choice,"3"))&&flag!=1)
			flag=2;
	}while(flag);
	if(!strcmp(choice,"1"))								//SEARCH BY BARCODE
	{
SEARCH_BC:
		do
		{
			strcpy(temp,barcode);						//IN CASE IF USER SAY TO ADD.....
			header(1);
			cout<<"\t\t\t\tSEARCH PRODUCT DATA"<<endl;
			cout<<"\t\t\t\t-------------------"<<endl<<endl;
			cout<<"\n";
			cout<<" >>    SEARCH BY BARCODE "<<endl;
			cout<<"       -------------------";
			cout<<"\n\n";
			if(!flag||flag==1)
				cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
			if(flag==2)
				cout<<"       !.....|| BARCODE NOT FOUND ||.....!\t    HIT \'N\' TO ADD THIS ITEM <<";
			cout<<"\n\n";
			cout<<"       Enter The ITEM BARCODE : ";
			cin.getline(barcode,20);
			barcode[20]=convert(barcode);
			if(flag==2)
			{
				if(!strcmpi(barcode,"N"))
				{
					go=prod[sno].enter_data(sno,temp);
					if(go!=0)
						++sno;
					flag=0;
					goto SEARCH_BC;
				}
			}
			flag=0;
			if(!strcmp(barcode,""))
				flag=1;
			if(!strcmp(barcode,"0"))					//GO BACK TO PREVIOUS MENU
				break;
			if(flag!=1)
			{
				for(i=1;i<sno;++i)
				{
					if(!strcmp(barcode,prod[i].barcode))
					{
						flag=0;							//BARCODE FOUND
						break;
					}
					else
						flag=2;							//BARCODE NT FOUND
				}
			}
		}while(flag);
		if(!strcmp(barcode,"0"))
			goto SEARCH_MENU;
		if(flag==0)
		{
			header(1);
			cout<<"\t\t\t\tSEARCH PRODUCT DATA"<<endl;
			cout<<"\t\t\t\t-------------------"<<endl<<endl;
			cout<<"\n";
			cout<<" >>    SEARCH RESULTS "<<endl;
			cout<<"       ---------------";
			cout<<"\n\n";
			cout<<"================================================================================"<<endl;
			cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
			cout<<"================================================================================"<<endl;	
			cout<<i<<".";
			prod[i].show_data();
			cout<<endl<<endl;
			cout<<"--------------------------------------------------------------------------------"<<endl;
		}
	}
SEARCH_NAME:
	if(!strcmp(choice,"2"))								//SEARCH BY PRODUCT NAME
	{
		struct get_word
		{
			char wrd[50];
		}words[50];
		for(int l=0;l<50;++l)
		{
			strcpy(words[l].wrd,"");
		}
		struct prod_word
		{
			char prod_wrd[50];
			int bc;
		}prod_words[15000];
		for(l=0;l<15000;++l)
		{
			strcpy(prod_words[l].prod_wrd,"");
			prod_words[l].bc=0;
		}
		char mainword[50];
		char query_word[50];
		strcpy(mainword,"");
		strcpy(query_word,"");
		int i=0 , nwrd_query=0 , nwrd_prod=0 , bc_fnd[25] , size=0 , j=0 , k=0, flag=0;
		do
		{
			header(1);
			cout<<"\t\t\t\tSEARCH PRODUCT DATA"<<endl;
			cout<<"\t\t\t\t-------------------"<<endl<<endl;
			cout<<"\n";
			cout<<" >>    SEARCH BY PRODUCT NAME "<<endl;
			cout<<"       -----------------------";
			cout<<"\n\n";
			if(!flag||flag==1)
				cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
			if(flag==2)
				cout<<"       !.....|| ITEM NOT FOUND ||.....!\t\t\t  HIT \'0\' TO GO BACK <<";
			flag=0;
			cout<<"\n\n";
			cout<<"       Enter The ITEM NAME : ";
			cin.getline(query_word,50);
			if(!strcmp(query_word,""))
				flag=1;
			if(!strcmp(query_word,"0"))					//GO BACK TO PREVIOUS MENU
				break;
			if(flag!=1)
			{
				break;
			}
		}while(flag);
		if(!strcmp(query_word,"0"))
			goto SEARCH_MENU;
		if(flag!=1)
		{
			strcpy(mainword,query_word);
			for(i=0;query_word[i]!='\0';++i)
			{
				if(query_word[i]!=' ')
				{
					words[nwrd_query].wrd[j]=query_word[i];
					++j;
				}
				if(query_word[i]==' '||query_word[i+1]=='\0')
				{
					words[nwrd_query].wrd[j]='\0';
					++nwrd_query;
					j=0;
				}
			}
			for(i=1;i<sno;++i)
			{
				if(!strcmpi(mainword,prod[i].prod_name))
				{
					bc_fnd[size++]=i;
					break;
				}
			}
			int flag=0;
			for(i=1;i<sno;++i)
			{
				for(j=0;prod[i].prod_name[j]!='\0';++j)
				{
					if(prod[i].prod_name[j]!=' ')
					{
						prod_words[nwrd_prod].prod_wrd[k]=prod[i].prod_name[j];
						++k;
					}
					if(prod[i].prod_name[j]==' '||prod[i].prod_name[j+1]=='\0')
					{
						prod_words[nwrd_prod].prod_wrd[k]='\0';
						prod_words[nwrd_prod].bc=i;
						nwrd_prod++;
						k=0;
					}
				}
				for(int h=0;h<nwrd_query;++h)
				{
					for(int o=0;o<nwrd_prod;++o)
					{
						if(!strcmpi(words[h].wrd,prod_words[o].prod_wrd))
						{
							for(int n=0;n<size;++n)
							{
								if(bc_fnd[n]==prod_words[o].bc)
								{
									flag=1;
								
								}
							}
							if(flag!=1)
							{
								bc_fnd[size]=prod_words[o].bc;
								size=size+1;
								flag=0;
							
							}
						}
					}
				}
			}
			nwrd_prod=0;
		}
		if(flag==0)
		{
			header(1);
			cout<<"\t\t\t\tSEARCH PRODUCT DATA"<<endl;
			cout<<"\t\t\t\t-------------------"<<endl<<endl;
			cout<<"\n";
			cout<<" >>    SEARCH RESULTS "<<endl;
			cout<<"       ---------------";
			cout<<"\n\n";
			cout<<"================================================================================"<<endl;
			cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
			cout<<"================================================================================"<<endl;	
			for(int g=1;g<sno;++g)
			{
				for(int f=0;f<size;++f)
				{
					if(g==bc_fnd[f])
					{
						prod[g].show_data();
						cout<<endl<<endl;
						cout<<"--------------------------------------------------------------------------------"<<endl;
					}
				}
			}
		}
	}
	if(!strcmp(choice,"3"))
		return 3;
	else
		return 0;
}

int delete_product_main(int sno)
{
	int flag=0,i=0,j=0;
	char del_barcode[20],choice[5];
FIND_DEL_BC:
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t\tDELETE PRODUCT DATA"<<endl;
		cout<<"\t\t\t\t-------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"    >> FIND PRODUCT \t\t   >> CONFIRM \t\t >> DELETE PRODUCT"<<endl;
		cout<<"       -------------"<<endl;
		cout<<"\n";
		if(!flag||flag==1)
			cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
		if(flag==2)
			cout<<"       !.....|| BARCODE NOT FOUND ||.....!\t\t  HIT \'0\' TO GO BACK <<";
		flag=0;
		cout<<"\n\n";
		cout<<"       Enter The ITEM BARCODE : ";
		cin.getline(del_barcode,20);
		del_barcode[20]=convert(del_barcode);
		if(!strcmp(del_barcode,""))
			flag=1;
		if(!strcmp(del_barcode,"0"))
			return 0;
		if(flag!=1)
		{
			for(i=1;i<sno;++i)
			{
				if(!strcmp(prod[i].barcode,del_barcode))
				{
					flag=0;
					break;
				}
				else
					flag=2;
			}
		}
	}while(flag);
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t\tDELETE PRODUCT DATA"<<endl;
		cout<<"\t\t\t\t-------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"    >> FIND PRODUCT \t\t   >> CONFIRM \t\t >> DELETE PRODUCT"<<endl;
		cout<<"\t\t\t\t      --------"<<endl;
		cout<<"\n\n";
		cout<<"       !!....PRODUCT FOUND....!!";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		prod[i].show_data();
		cout<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl<<endl<<endl;
		cout<<"       Are You Sure You Want To DELETE This Product ?     >> Y : YES"<<endl<<endl;
		cout<<"                                                          >> N : NO"<<endl<<endl;
		cout<<"                                                          >> C : CHANGE PRODUCT"<<endl;
		cout<<"\n";
		if(flag==1)
			cout<<"                                     !.....ENTER Y / N / C.....!";
		if(flag==2)
			cout<<"                                      !.....INVALID CHOICE.....!";
		cout<<"\n\n";
		flag=0;
		cout<<"                                             Enter Your CHOICE : ";
		cin.getline(choice,5);		
		if(!strcmp(choice,""))
			flag=1;
		if(flag!=1)
			if(strcmpi(choice,"Y")&&strcmpi(choice,"N")&&strcmpi(choice,"C"))
				flag=2;
	}while(flag);
	if(!strcmpi(choice,"C"))											// --- >> "CHANGE PRODUCT"
		goto FIND_DEL_BC;
	if(!strcmpi(choice,"N"))											// --- >> "NO"
	{
		header(1);
		cout<<"\t\t\t\tDELETE PRODUCT DATA"<<endl;
		cout<<"\t\t\t\t-------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"    >> FIND PRODUCT \t\t   >> CONFIRM \t\t >> DELETE PRODUCT"<<endl;
		cout<<"\t\t\t\t      --------"<<endl;
		cout<<"\n\n\n";
		cout<<"\t\t\t!.....|| PRODUCT NOT DELETED ||.....!"<<endl;
		cout<<"\t\t\t-------------------------------------"<<endl<<endl;
		return 0;
	}
	else																// --- >> "YES"
	{
		char news[150]="ITEM DELETED : ";
		header(1);
		cout<<"\t\t\t\tDELETE PRODUCT DATA"<<endl;
		cout<<"\t\t\t\t-------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"    >> FIND PRODUCT \t\t   >> CONFIRM \t\t >> DELETE PRODUCT"<<endl;
		cout<<"\t\t\t\t\t\t\t    ---------------"<<endl;
		cout<<"\n";
		cout<<"\n";
		cout<<"\n\t\t\t\t     DELETING...."<<endl;
		for(j=0;j<=700000000;j++);
		header(1);
		cout<<"\t\t\t\tDELETE PRODUCT DATA"<<endl;
		cout<<"\t\t\t\t-------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"    >> FIND PRODUCT \t\t   >> CONFIRM \t\t >> DELETE PRODUCT"<<endl;
		cout<<"\t\t\t\t\t\t\t    ---------------"<<endl;
		cout<<"\n\n\n";
		for(j=i;j<=sno;++j)
		{
			prod[j]=prod[j+1];
		}
		cout<<"\t\t\t!.....|| PRODUCT DELETED ||.....!"<<endl;
		cout<<"\t\t\t---------------------------------"<<endl<<endl;\
		fstream serial;
		serial.open("serial.txt",ios::out);
		serial<<sno-1<<endl;
		serial.close();
		return --sno;
	}
}

int edit_product_main(int &sno)
{
	int flag=0,i=0,temp=0,go=0;
	char choice[5],init_barcode[20],temp_bc[20]="";
FIND_EDIT_BC:
	do
	{
		strcpy(temp_bc,init_barcode);
		header(1);
		cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
		cout<<"      -------------"<<endl;
		cout<<"\n";
		if(!flag||flag==1)
			cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
		if(flag==2)
			cout<<"       !.....|| BARCODE NOT FOUND ||.....!\t    HIT \'N\' TO ADD THIS ITEM <<";
		cout<<"\n\n";
		cout<<"       Enter The ITEM BARCODE : ";
		cin.getline(init_barcode,20);
		init_barcode[20]=convert(init_barcode);
		if(flag==2)
		{
			if(!strcmpi(init_barcode,"N"))
			{
				go=prod[sno].enter_data(sno,temp_bc);
				if(go!=0)
					++sno;
				flag=0;
				goto FIND_EDIT_BC;
			}
		}
		flag=0;
		if(!strcmp(init_barcode,""))
			flag=1;
		if(!strcmp(init_barcode,"0"))
			return 3;											//GO BACK TO MAIN MENU
		if(flag!=1)
		{
			for(i=1;i<sno;++i)
			{
				if(!strcmpi(prod[i].barcode,init_barcode))
				{
					flag=0;
					break;
				}
				else
					flag=2;
			}
		}
	}while(flag);
	flag=0;
EDIT_RESULTS:
	do
	{
		header(1);
		cout<<"\t\t\t\tEDIT PRODUCT ENTRY"<<endl;
		cout<<"\t\t\t\t------------------"<<endl<<endl;
		cout<<"\n";
		cout<<"   >> FIND PRODUCT      >> SELECT FIELD      >> EDIT FIELD      >> CONFIRM"<<endl;
		cout<<"                           -------------"<<endl;
		cout<<"\n\n";
		cout<<"       !!....PRODUCT FOUND....!!";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"SNO.\tBARCODE\t\t\tPRODUCT NAME\t\t\tPRICE"<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		prod[i].show_data();
		cout<<endl<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl<<endl<<endl;
		cout<<"          Choose The FIELD To EDIT      >>    B : BARCODE"<<endl<<endl;
		cout<<"                                        >>    N : PRODUCT NAME"<<endl<<endl;
		cout<<"                                        >>    P : PRODUCT PRICE"<<endl<<endl;
		cout<<"                                        >>    C : CHANGE PRODUCT"<<endl<<endl;
		cout<<"                                        >>    G : MAIN MENU"<<endl;
		cout<<"\n";
		if(flag==1)
			cout<<"                 !.....ENTER A VALID CHOICE.....!";
		if(flag==2)
			cout<<"                       !.....INVALID CHOICE.....!";
		cout<<"\n\n";
		flag=0;
		cout<<"                              Enter Your CHOICE : ";
		cin.getline(choice,5);		
		if(!strcmp(choice,""))
			flag=1;
		if(flag!=1)
			if(strcmpi(choice,"B")&&strcmpi(choice,"N")&&strcmpi(choice,"P")&&strcmpi(choice,"C")&&strcmpi(choice,"G"))
				flag=2;
	}while(flag);
	if(!strcmpi(choice,"C"))
		goto FIND_EDIT_BC;
	if(!strcmpi(choice,"G"))
		return 3;
	if(!strcmpi(choice,"B"))
	{
		temp=prod[i].edit_data("barcode",sno,i);
		if(!temp)
			goto EDIT_RESULTS;
	}
	if(!strcmpi(choice,"N"))
	{
		temp=prod[i].edit_data("product",sno,i);
		if(!temp)
			goto EDIT_RESULTS;
	}
	if(!strcmpi(choice,"P"))
	{
		temp=prod[i].edit_data("price",sno,i);
		if(!temp)
			goto EDIT_RESULTS;
	}
	return 0;
}

int parental_ctrl()
{
	char new_user[20],new_pwd[20],confirm_pwd[20],choice[5],curr_pwd[20]="";
	int flag=0;
ENTER_USER:
	do
	{
		if(!strcmp(curr_pwd,""))
		{
			do
			{
				header(1);
				cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
				cout<<"\t\t\t    --------------------------"<<endl;
				cout<<endl<<endl;
				cout<<"\n";
				if(!flag)
				{
					cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
				}
				if(flag==1)
				{
					cout<<"  !!=====ENTER YOUR CURRENT PASSWORD=====!!\t\t  HIT \'0\' TO GO BACK <<";
				}
				if(flag==2)
				{
					cout<<"  !!=====INVALID CURRENT PASSWORD=====!!\t\t  HIT \'0\' TO GO BACK <<";
				}
				cout<<"\n\n";
				cout<<" >> CURRENT PASSWORD      :           ";
				cin.getline(curr_pwd,20);
				if(!strcmp(curr_pwd,::password))
					break;
				if(strcmp(curr_pwd,::password))
					flag=2;
				if(!strcmp(curr_pwd,""))
					flag=1;
				if(!strcmp(curr_pwd,"0"))
					break;
			}while(strcmp(curr_pwd,::password));
				if(!strcmp(curr_pwd,"0"))
					return 3;
			flag=0;
		}
		if(flag!=4)														//IF PWD AND CONFIRM DONT MATCH
		{
			header(1);
			cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
			cout<<"\t\t\t    --------------------------"<<endl;
			cout<<endl<<endl;
			cout<<"\n";
		}
		if(!flag)
		{
			cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
		}
		if(flag==1)
		{
			cout<<"  !!=====USERNAME FIELD IS MANDATORY=====!!\t\t  HIT \'0\' TO GO BACK <<";
		}
		if(flag==4)
		{
			cout<<"  !!=====PASSWORDS DO NOT MATCH=====!!      \t\t  HIT \'0\' TO GO BACK <<";
		}
		flag=0;
		cout<<"\n\n";
		cout<<" >> NEW USERNAME          :           ";
		cin.getline(new_user,20);
		if(!strcmp(new_user,"0"))
			return 3;
		if(!strcmp(new_user,""))
			flag=1;													//flag=1 >> USERNAME BLANK		
		if(flag!=1)
		{
			do
			{
				header(1);
				cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
				cout<<"\t\t\t    --------------------------"<<endl;
				cout<<endl<<endl;
				cout<<"\n";
				if(!flag)
				{
					cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
				}
				if(flag==2)
				{
					cout<<"  !!=====PASSWORD FIELD IS MANDATORY=====!!\t\t  HIT \'0\' TO GO BACK <<";
				}
				flag=0;
				cout<<"\n\n";
				cout<<" >> NEW USERNAME          :           "<<new_user;
				cout<<"\n\n";
				cout<<" >> NEW PASSWORD          :           ";			
				cin.getline(new_pwd,20);
				if(!strcmp(new_pwd,"0"))
					goto ENTER_USER;
				if(!strcmp(new_pwd,""))
					flag=2;												//flag=2 >> PWD BLANK
				if(flag!=2)
				{
					do
					{
						header(1);
						cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
						cout<<"\t\t\t    --------------------------"<<endl;
						cout<<endl<<endl;
						cout<<"\n";
						if(flag==3)
						{
							cout<<"  !!=====RE-ENTER THE PASSWORD=====!!";
						}
						if(flag==4)
						{
							goto ENTER_USER;
						}
						flag=0;
						cout<<"\n\n";
						cout<<" >> NEW USERNAME          :           "<<new_user;
						cout<<"\n\n";
						cout<<" >> CONFIRM PASSWORD      :           ";
						cin.getline(confirm_pwd,20);
						if(!strcmp(confirm_pwd,""))
							flag=3;	
						if(flag!=3)
							if(strcmp(new_pwd,confirm_pwd))
								flag=4;
					}while(flag);
				}
			}while(flag);
		}
	}while(flag);
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
		cout<<"\t\t\t    --------------------------"<<endl;
		cout<<endl<<endl;
		cout<<"\n";
		cout<<"\n\n";
		cout<<"    ARE YOU SURE TO CHANGE THE USERNAME & PASSWORD OF THE DATABASE ?"<<endl<<endl;
		cout<<"                                                      >>  Y : YES"<<endl<<endl;
		cout<<"                                                      >>  N : NO"<<endl;
		cout<<"\n";
		if(flag==1)
			cout<<"                                      !.....ENTER Y / N.....!";
		if(flag==2)
			cout<<"                                   !.....INVALID CHOICE.....!";
		flag=0;
		cout<<"\n\n";
		cout<<"                                          Enter Your CHOICE : ";
		cin.getline(choice,5);
		if(!strcmp(choice,""))
			flag=1;
		if(flag!=1)
			if(strcmpi(choice,"Y")&&strcmpi(choice,"N"))
				flag=2;
	}while(flag);
	if(!strcmpi(choice,"N"))
	{
		header(1);
		cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
		cout<<"\t\t\t    --------------------------"<<endl;
		cout<<endl<<endl;
		cout<<"\n";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"                !.....|| USERNAME & PASSWORD NOT CHANGED ||.....!"<<endl;             
		cout<<"--------------------------------------------------------------------------------"<<endl;
		return 0;
	}
	if(!strcmpi(choice,"Y"))
	{
		header(1);
		cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
		cout<<"\t\t\t    --------------------------"<<endl;
		cout<<endl<<endl;
		cout<<"\n";
		cout<<"\n\n";
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"		        CHANGING USERNAME & PASSWORD......"<<endl;
		cout<<"--------------------------------------------------------------------------------"<<endl;
		for(int i=0;i<=700000000;i++);
		header(1);
		cout<<"\t\t\t    USERNAME & PASSWORD CHANGE"<<endl;
		cout<<"\t\t\t    --------------------------"<<endl;
		cout<<endl<<endl;
		cout<<"\n";
		cout<<"\n\n";
		fstream fout;
		fout.open("parental.txt",ios::out);
		fout<<new_user<<'\n'<<new_pwd;
		fout.close();
		strcpy(::username,new_user);
		strcpy(::password,new_pwd);
		cout<<"--------------------------------------------------------------------------------"<<endl;
		cout<<"                 !.....|| USERNAME & PASSWORD CHANGED ||.....!"<<endl;             
		cout<<"--------------------------------------------------------------------------------"<<endl;
		return 0;
	}
	return 0;
}


int billing_main(int sno)
{
	int i=0,go=0,times=1;
	fstream enter;
	fstream billdata;
	if(::invoice==1)
	{
		billdata.open("billdata.txt",ios::out);
		billdata.close();
	}
	billdata.open("billdata.txt",ios::app);
	for(i=::invoice;;)
	{
		go=sale[i].new_bill(sno);
		++times;
		if(!go)
			break;
		billdata<<sale[i].total_bill<<"\n"<<sale[i].discount<<"\n"<<sale[i].net_total<<"\n";
		fstream ritebill;
		if(::invoice==1)
			ritebill.open("billitems.dat",ios::out|ios::binary);
		else
			ritebill.open("billitems.dat",ios::app|ios::binary);
		ritebill.write((char*)&sale[i],sizeof(sale[i]));
		ritebill.close();
		i=++::invoice;

	}
	billdata.close();
	enter.open("invoice.txt",ios::out);
	enter<<::invoice;
	enter.close();
	header(1);
	cout<<"\t\t\t\t  SALES & INVOICE"<<endl;
	cout<<"\t\t\t\t  ---------------"<<endl<<endl;
	cout<<"\n";
	cout<<" >> INVOICE NUMBER : "<<::invoice;
	cout<<"\n\n";
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
	cout<<"--------------------------------------------------------------------------------"<<endl<<endl<<endl;	
	return 0;
}

int sales_history()
{
	int i=1,no=1;
	float total_sales=0.0;
	for(i=1;i<::invoice;++i)
		total_sales+=sale[i].net_total;
	if((::invoice-1)>5)
	{
		no=(::invoice-1)/5;
	}
	i=::invoice-1;
	int temp=no;
	for(int j=1;j<=no+1;j++)
	{
		header(1);
		cout<<"\t\t\t\t  SALES HISTORY"<<endl;
		cout<<"\t\t\t\t  -------------"<<endl<<endl;
		cout<<" >> TOTAL SALES   :  "<<total_sales<<" SR"<<endl;
		cout<<"    ==================================="<<endl;
		for(;i>0;--i)
		{
			cout<<"\n";
			cout<<" >> INVOICE NO. : "<<i<<endl;
			cout<<"    -------------------"<<endl;
			cout<<"\t\t ";cout<<" >> TOTAL      : "<<sale[i].total_bill<<" SR"<<endl<<endl;
			if(sale[i].discount!=0)
			{
			cout<<"\t\t ";cout<<" >> DISCOUNT   : "<<sale[i].discount<<" SR"<<endl<<endl;
			}
			cout<<"\t\t ";cout<<" >> NET TOTAL  : "<<sale[i].net_total<<" SR"<<endl<<endl;
			if(i==5*temp)
			{
				temp--;
				break;
			}
		}
		if((j+1)<=(no+1))
		{
			cout<<"\nHit ENTER To VIEW PAST SALES...";
			cin.get();
		}
	}
	return 0;
}
int admin_ctrl(int sno)
{
	int flag=0,go=0,total=0,i=0,error=0;
	char menuchoice[5];
	//flag=login(2);
	if(flag==3)
		return 3;
	flag=0,go=0;
	do
	{
		do
		{
			admin_menu();
			cout<<"\n";
			if(error==1)
			{
				cout<<"!.....INVALID CHOICE.....!";
				error=0;
			}
			cout<<"\n\n";
			cout<<"Enter Your CHOICE : ";
			cin.getline(menuchoice,5);
		}while(!strcmp(menuchoice,""));
		total=0;
		for(i=0;menuchoice[i]!='\0';++i)
		{
			total+=menuchoice[i];
		}
		flag=0;
		switch(total)
		{
		case 49:
			go=parental_ctrl();
			flag=0;
			break;
		case 50:
			flag=0;
			go=init_all(sno);
			if(!go)
			{
				cout<<"Hit ENTER To Continue .. ";
				if(cin.get()||!cin.get()){}
				main();
			}
			break;
		case 51:								//VIEW PAST INVOICES BY INVOICE NO.
			go=invoice_history();
			break;
		case 52:
			return 3;
			break;
		default:
			break;
		}
		if(total!=49&&total!=50&&total!=51&&total!=52)error=1;
		if(go!=3&&error==0)
		{
			cout<<"\n\n Hit ENTER To Continue .. ";
			if(cin.get()||!cin.get()){}
		}
	}while(flag||!flag);
	return 0;
}
int invoice_history()
{
	int flag=0;
	char inv_temp[6];
	do
	{
		header(1);
		cout<<"\t\t\t\t INVOICE HISTORY "<<endl;
		cout<<"\t\t\t\t-----------------"<<endl;
		cout<<"\n\n";
		if(!flag||flag==1)
			cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
		if(flag==2)
		cout<<"  !.....|| INVOICE NOT FOUND ||.....!\t\t\t  HIT \'0\' TO GO BACK <<";
		cout<<"\n\n";
		cout<<"  Enter The INVOICE NO.: ";
		cin.getline(inv_temp,6);
		if(!strcmp(inv_temp,""))
			flag=1;
		if(atoi(inv_temp)>=::invoice)
			flag=2;
		if(!strcmp(inv_temp,"0"))
			return 3;
		if(atoi(inv_temp)<::invoice&&atoi(inv_temp)>0&&atoi(inv_temp)!=0)
			flag=0;
	}while(flag);
	int no=atoi(inv_temp);
	header(1);
	cout<<"\t\t\t\t SEARCH HISTORY "<<endl;
	cout<<"\t\t\t\t----------------"<<endl;
	cout<<"\n";
	cout<<" >> INVOICE NUMBER : "<<inv_temp<<"\t\t\t\t\t";
	cout<<"\n\n";
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"SNO.\tBARCODE\t\tPRODUCT NAME\t\t\tRATE\tQTY\tPRICE"<<endl<<endl;
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"\n";
	for(int k=1;k<=sale[no].item_ctr;++k)
	{
		cout<<k<<".";sale[no].show_item(sale[no].item[k],1);
		
	}
	cout<<"--------------------------------------------------------------------------------"<<endl;
	cout<<"\t\t\t\t\t\t ";cout<<" >> TOTAL      : "<<sale[no].total_bill<<" SR"<<endl<<endl;
	cout<<"\t\t\t\t\t\t ";cout<<" >> DISCOUNT   : "<<sale[no].discount<<" SR"<<endl<<endl;
	cout<<"\t\t\t\t\t\t ";cout<<" >> NET TOTAL  : "<<sale[no].net_total<<" SR"<<endl<<endl;
	cout<<"--------------------------------------------------------------------------------"<<endl;
	return 0;
}
int init_all(int sno)
{
	int flag=0,i=0;
	char choice[5],curr_pwd[20]="";
MAIN:
	do
	{
		header(1);
		cout<<"\t\t\t     DATABASE INITIALIZATION "<<endl;
		cout<<"\t\t\t    -------------------------"<<endl;
		cout<<"\n\n";
		cout<<"   !!....WARNING....!!";
		cout<<"\n";
		cout<<"   ===================";
		cout<<"\n\n";
		cout<<"   >> INITIALIZING THE DATABASE IN THE LOSS OF ALL DATA PERTAINING TO \n\n      ITEMS AND SALES HISTORY ....... !!! "<<endl;
		cout<<"\n\n";
		cout<<"   >> THE DATABASE WILL BE LIKE A FRESHLY BOUGHT ONES ...... "<<endl;
		cout<<"\n\n";
		cout<<"                    Are You SURE To FORMAT ?       >> ENTER : YES"<<endl<<endl;
		cout<<"                                                   >>     N : NO "<<endl;
		cout<<"\n";
		if(flag==1)
			cout<<"                                  !=====INVLAID CHOICE=====!!";
		cout<<"\n\n";
		flag=0;
		cout<<"                         Enter Your CHOICE                  : ";
		cin.getline(choice,5);
		if(strcmpi(choice,"N"))
			flag=1;
		if(!strcmpi(choice,""))
			break;
	}while(flag);
	if(!strcmpi(choice,"N"))
		return 3;
	flag=0;
	do
	{
		header(1);
		cout<<"\t\t\t     DATABASE INITIALIZATION "<<endl;
		cout<<"\t\t\t    -------------------------"<<endl;
		cout<<endl<<endl;
		cout<<"\n";
		if(!flag)
		{
			cout<<"\t\t\t\t\t\t\t  HIT \'0\' TO GO BACK <<";
		}
		if(flag==1)
		{
			cout<<"  !!=====ENTER YOUR CURRENT PASSWORD=====!!\t\t  HIT \'0\' TO GO BACK <<";
		}
		if(flag==2)
		{
			cout<<"  !!=====INVALID CURRENT PASSWORD=====!!\t\t  HIT \'0\' TO GO BACK <<";
		}
		cout<<"\n\n";
		cout<<" >> CURRENT PASSWORD      :           ";
		cin.getline(curr_pwd,20);
		if(!strcmp(curr_pwd,::password))
			break;
		if(strcmp(curr_pwd,::password))
			flag=2;
		if(!strcmp(curr_pwd,""))
			flag=1;
		if(!strcmp(curr_pwd,"0"))
			break;
	}while(strcmp(curr_pwd,::password));
	if(!strcmp(curr_pwd,"0"))
		goto MAIN;
	//STARTING FORMATTING
	fstream file;
	header(1);
	cout<<"\t\t\t     DATABASE INITIALIZATION "<<endl;
	cout<<"\t\t\t    -------------------------"<<endl;
	cout<<endl<<endl;
	cout<<"\n\n\n";
	cout<<" >> INITIALIZING FORMATTING PROCESS . . . . . "<<endl<<endl;
	for(i=0;i<=750000000;i++);
	file.open("billitems.dat",ios::out|ios::binary);
	file.close();
	cout<<" >> CLEANING UP ITEM DATABASE       . . . . . "<<endl<<endl;
	for(i=0;i<=750000000;i++);
	file.open("dataitems.txt",ios::out);
	file.close();
	cout<<" >> CLEANING UP SALES INFORMATION   . . . . . "<<endl<<endl;
	for(i=0;i<=750000000;i++);
	file.open("invoice.txt",ios::out);
	file.close();
	cout<<" >> SETTING ALL COUNTERS TO \'0\'    . . . . . "<<endl<<endl;
	for(i=0;i<=750000000;i++);
	file.open("parental.txt",ios::out);
	file.close();
	cout<<" >> FINISHING FORMATTING PROCESS    . . . . . "<<endl<<endl;
	for(i=0;i<=750000000;i++);
	file.open("serial.txt",ios::out);
	file.close();
	header(1);
	cout<<"\t\t\t     DATABASE INITIALIZATION "<<endl;
	cout<<"\t\t\t    -------------------------"<<endl;
	cout<<endl<<endl;
	cout<<"\n\n\n";
	cout<<" >> !! *** DATABASE FORMATTING IS COMPLETED *** !! << "<<endl;
	cout<<"    ------------------------------------------------- "<<endl;
	cout<<"\n\n";
	cout<<" >> USERNAME   :   amasi "<<endl<<endl;
	cout<<" >> PASSWORD   :   amasi "<<endl<<endl;
	return 0;
}
void menu()
{
	header(1);
	cout<<"\t\t\t\t    MAIN MENU "<<endl;
	cout<<"\t\t\t\t   -----------"<<endl;
	cout<<"\n\t\t";
	for(int i=0;i<51;++i)
		cout<<(char)220;
	cout<<"\n\t\t"<<(char)219<<"                                                 "<<(char)219;
	cout<<"\n\t\t|  >> 1.  New Product Entry                       |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 2.  Edit Product Data                       |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 3.  All Product Data                        |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 4.  Search Product Data                     |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 5.  Delete Product Data                     |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 6.  Sales & Invoice                         |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 7.  Sales History                           |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 8.  Administrative Tools                    |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 9.  Log Off                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 10. Exit                                    |";
	cout<<"\n\t\t"<<(char)219<<"                                                 "<<(char)219;
	cout<<"\n\t\t";
	for(i=0;i<51;++i)
		cout<<(char)223;
	cout<<endl<<endl;
}

void admin_menu()
{
	header(1);
	cout<<"\t\t\t\t    ADMIN MENU "<<endl;
	cout<<"\t\t\t\t   ------------"<<endl;
	cout<<"\n\t\t";
	for(int i=0;i<51;++i)
		cout<<(char)220;
	cout<<"\n\t\t"<<(char)219<<"                                                 "<<(char)219;
	cout<<"\n\t\t|  >> 1.  Change Username & Password              |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 2.  Reset Supermarket Database              |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 3.  View Past Invoices                      |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|  >> 4.  Main Menu                               |";
	cout<<"\n\t\t"<<(char)219<<"                                                 "<<(char)219;
	cout<<"\n\t\t";
	for(i=0;i<51;++i)
		cout<<(char)223;
	cout<<endl<<endl;
}

void footer()
{
	system("cls");
	for(int i=0;i<=18;++i)
		cout<<'\n';
	cout<<"\n\t\t*----------------------------------------------------*";
	cout<<"\n\t\t|                                                    |";
	cout<<"\n\t\t|          THANK YOU FOR USING THIS PROGRAMME        |";
	cout<<"\n\t\t|                                                    |";
	cout<<"\n\t\t|               PROGRAMMED & DESIGNED BY             |";
	cout<<"\n\t\t|             ----------------------------           |";
	cout<<"\n\t\t|                   MOHAMMED AZHAR                   |";
	cout<<"\n\t\t|                                                    |";
	cout<<"\n\t\t*----------------------------------------------------*"<<endl;
	getchar();
	exit(0);
}

void logged_off()
{
	header(1);
	cout<<""<<endl;
	cout<<""<<endl;
	cout<<"\n\t\t*-------------------------------------------------*";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                    LOGGED OFF                   |";
	cout<<"\n\t\t|                  --------------                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|           !!...Hit ENTER To LOG IN...!!         |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t|                                                 |";
	cout<<"\n\t\t*-------------------------------------------------*"<<endl<<endl;
}

Read more ...