Code:
//program for creating bill in a supermarket.
//Created by Chetan Bhasin
//BILL.CPP
//*****************************************************************************************************
// HEADER FILES INCLUDED
//*****************************************************************************************************
#include<iostream.h>
#include<conio.h>
#include<fstream.h>
#include<string.h>
#include<stdio.h>
#include<stdlib.h>
#include<iomanip.h>
//Declaration of global variables for further use in the program.
int k=7,r=0,flag=0;
//Declaration of objects for performing file input and output operations.
ofstream fout;
ifstream fin;
struct date
{
int dd,mm,yy;
}
//*****************************************************************************************************
// DECLARATION OF CLASS FOR STORING ITEM DETAILS
//*****************************************************************************************************
class item
{
int itemno;
char name[25];
date d;
public:
void add()
{
cout<<"\n\n\tItem No: ";
cin>>itemno;
cout<<"\n\n\tName of the item: ";
gets(name);
cout<<"\n\n\tManufacturing Date(dd-mm-yy): ";
cin>>d.mm>>d.dd>>d.yy;
}
void show()
{
cout<<"\n\tItem No: ";
cout<<itemno;
cout<<"\n\n\tName of the item: ";
cout<<name;
cout<<"\n\n\tDate : ";
cout<<d.mm<<"-"<<d.dd<<"-"<<d.yy;
}
void report()
{
gotoxy(3,k);
cout<<itemno;
gotoxy(13,k);
puts(name);
}
int retno()
{
return(itemno);
}
};
class amount: public item
{
float price,qty,tax,gross,dis,netamt;
public:
void add();
void show();
void report();
void calculate();
void pay();
float retnetamt()
{
return(netamt);
}
}amt;
void amount::add()
{
item::add();
cout<<"\n\n\tPrice: ";
cin>>price;
cout<<"\n\n\tQuantity: ";
cin>>qty;
cout<<"\n\n\tTax percent: ";
cin>>tax;
cout<<"\n\n\tDiscount percent: ";
cin>>dis;
calculate();
fout.write((char *)&amt,sizeof(amt));
fout.close();
}
void amount::calculate()
{
gross=price+(price*(tax/100));
netamt=qty*(gross-(gross*(dis/100)));
}
void amount::show()
{
fin.open("itemstore.dat",ios::binary);
fin.read((char*)&amt,sizeof(amt));
item::show();
cout<<"\n\n\tNet amount: ";
cout<<netamt;
fin.close();
}
void amount::report()
{
item::report();
gotoxy(23,k);
cout<<price;
gotoxy(33,k);
cout<<qty;
gotoxy(44,k);
cout<<tax;
gotoxy(52,k);
cout<<dis;
gotoxy(64,k);
cout<<netamt;
k=k+1;
if(k==50)
{
gotoxy(25,50);
cout<<"PRESS ANY KEY TO CONTINUE...";
getch();
k=7;
clrscr();
gotoxy(30,3);
cout<<" ITEM DETAILS ";
gotoxy(3,5);
cout<<"NUMBER";
gotoxy(13,5);
cout<<"NAME";
gotoxy(23,5);
cout<<"PRICE";
gotoxy(33,5);
cout<<"QUANTITY";
gotoxy(44,5);
cout<<"TAX";
gotoxy(52,5);
cout<<"DEDUCTION";
gotoxy(64,5);
cout<<"NET AMOUNT";
}
}
void amount::pay()
{
show();
cout<<"\n\n\n\t\t*********************************************";
cout<<"\n\t\t DETAILS";
cout<<"\n\t\t*********************************************";
cout<<"\n\n\t\tPRICE :"<<price;
cout<<"\n\n\t\tQUANTITY :"<<qty;
cout<<"\n\t\tTAX PERCENTAGE :"<<tax;
cout<<"\n\t\tDISCOUNT PERCENTAGE :"<<dis;
cout<<"\n\n\n\t\tNET AMOUNT :Rs."<<netamt;
cout<<"\n\t\t*********************************************";
}
void main()
{
cout.setf(ios::fixed);
cout.setf(ios::showpoint);
cout<<setprecision(2);
menu:
clrscr();
gotoxy(25,2);
cout<<"Super Market Billing ";
gotoxy(25,3);
cout<<"===========================\n\n";
cout<<"\n\t\t1.Bill Report\n\n";
cout<<"\t\t2.Add/Remove/Edit Item\n\n";
cout<<"\t\t3.Show Item Details\n\n";
cout<<"\t\t4.Exit\n\n";
cout<<"\t\tPlease Enter Required Option: ";
int ch,ff;
float gtotal;
cin>>ch;
switch(ch)
{
case 1:
ss:
clrscr();
gotoxy(25,2);
cout<<"Bill Details";
gotoxy(25,3);
cout<<"================\n\n";
cout<<"\n\t\t1.All Items\n\n";
cout<<"\t\t2.Back to Main menu\n\n";
cout<<"\t\tPlease Enter Required Option: ";
int cho;
cin>>cho;
if(cho==1)
{
clrscr();
gotoxy(30,3);
cout<<" BILL DETAILS ";
gotoxy(3,5);
cout<<"ITEM NO";
gotoxy(13,5);
cout<<"NAME";
gotoxy(23,5);
cout<<"PRICE";
gotoxy(33,5);
cout<<"QUANTITY";
gotoxy(44,5);
cout<<"TAX %";
gotoxy(52,5);
cout<<"DISCOUNT %";
gotoxy(64,5);
cout<<"NET AMOUNT";
fin.open("itemstore.dat",ios::binary);
if(!fin)
{
cout<<"\n\nFile Not Found...";
goto menu;
}
fin.seekg(0);
gtotal=0;
while(!fin.eof())
{
fin.read((char*)&amt,sizeof(amt));
if(!fin.eof())
{
amt.report();
gtotal+=amt.retnetamt();
ff=0;
}
if(ff!=0)
gtotal=0;
}
gotoxy(17,k);
cout<<"\n\n\n\t\t\tGrand Total="<<gtotal;
getch();
fin.close();
}
if(cho==2)
{
goto menu;
}
goto ss;
case 2:
db:
clrscr();
gotoxy(25,2);
cout<<"Bill Editor";
gotoxy(25,3);
cout<<"=================\n\n";
cout<<"\n\t\t1.Add Item Details\n\n";
cout<<"\t\t2.Edit Item Details\n\n";
cout<<"\t\t3.Delete Item Details\n\n";
cout<<"\t\t4.Back to Main Menu ";
int apc;
cin>>apc;
switch(apc)
{
case 1:
fout.open("itemstore.dat",ios::binary|ios::app);
amt.add();
cout<<"\n\t\tItem Added Successfully!";
getch();
goto db;
case 2:
int ino;
flag=0;
cout<<"\n\n\tEnter Item Number to be Edited :";
cin>>ino;
fin.open("itemstore.dat",ios::binary);
fout.open("itemstore.dat",ios::binary|ios::app);
if(!fin)
{
cout<<"\n\nFile Not Found...";
goto menu;
}
fin.seekg(0);
r=0;
while(!fin.eof())
{
fin.read((char*)&amt,sizeof(amt));
if(!fin.eof())
{
int x=amt.item::retno();
if(x==ino)
{
flag=1;
fout.seekp(r*sizeof(amt));
clrscr();
cout<<"\n\t\tCurrent Details are\n";
amt.show();
cout<<"\n\n\t\tEnter New Details\n";
amt.add();
cout<<"\n\t\tItem Details editted";
}
}
r++;
}
if(flag==0)
{
cout<<"\n\t\tItem No does not exist...Please Retry!";
getch();
goto db;
}
fin.close();
getch();
goto db;
case 3:
flag=0;
cout<<"\n\n\tEnter Item Number to be deleted :";
cin>>ino;
fin.open("itemstore.dat",ios::binary);
if(!fin)
{
cout<<"\n\nFile Not Found...";
goto menu;
}
fstream tmp("temp.dat",ios::binary|ios::out);
fin.seekg(0);
while(fin.read((char*)&amt, sizeof(amt)))
{
int x=amt.item::retno();
if(x!=ino)
tmp.write((char*)&amt,sizeof(amt));
else
{
flag=1;
}
}
fin.close();
tmp.close();
fout.open("itemstore.dat",ios::trunc|ios::binary);
fout.seekp(0);
tmp.open("temp.dat",ios::binary|ios::in);
if(!tmp)
{
cout<<"Error in File";
goto db;
}
while(tmp.read((char*)&amt,sizeof(amt)))
fout.write((char*)&amt,sizeof(amt));
tmp.close();
fout.close();
if(flag==1)
cout<<"\n\t\tItem Succesfully Deleted";
else if (flag==0)
cout<<"\n\t\tItem does not Exist! Please Retry";
getch();
goto db;
case 4:
goto menu;
default:
cout<<"\n\n\t\tWrong Choice!!! Retry";
getch();
goto db;
}
case 3:
clrscr();
flag=0;
int ino;
cout<<"\n\n\t\tEnter Item Number :";
cin>>ino;
fin.open("itemstore.dat",ios::binary);
if(!fin)
{
cout<<"\n\nFile Not Found...\nProgram Terminated!";
goto menu;
}
fin.seekg(0);
while(fin.read((char*)&amt,sizeof(amt)))
{
int x=amt.item::retno();
if(x==ino)
{
amt.pay();
flag=1;
break;
}
}
if(flag==0)
cout<<"\n\t\tItem does not exist....Please Retry!";
getch();
fin.close();
goto menu;
case 4:
clrscr();
gotoxy(20,20);
cout<<"ARE YOU SURE, YOU WANT TO EXIT (Y/N)?";
char yn;
cin>>yn;
if((yn=='Y')||(yn=='y'))
{
exit(0);
}
else if((yn=='N')||(yn=='n'))
goto menu;
else{goto menu;}
default:cout<<"\n\n\t\tWrong Choice....Please Retry!";
getch();
goto menu;
}
} 
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