This is a sample C++ Supermarket Billing Project for class 12 CBSE board. Select this program and save as .cpp file and compile it on Turbo C++.
//***************************************************************
// HEADER FILE USED IN PROJECT
//****************************************************************
#include<conio.h>
#include<stdio.h>
#include<process.h>
#include<fstream.h>
//***************************************************************
// CLASS USED IN PROJECT
//****************************************************************
class product
{
int pno;
char name[50];
float price, qty, tax, dis;
public:
void create_product()
{
cout << "\nPlease Enter The Product No. of The Product ";
cin >> pno;
cout << "\n\nPlease Enter The Name of The Product ";
gets(name);
cout << "\nPlease Enter The Price of The Product ";
cin >> price;
cout << "\nPlease Enter The Discount (%) ";
cin >> dis;
}
void show_product()
{
cout << "\nThe Product No. of The Product : " << pno;
cout << "\nThe Name of The Product : ";
puts(name);
cout << "\nThe Price of The Product : " << price;
cout << "\nDiscount : " << dis;
}
int retpno()
{
return pno;
}
float retprice()
{
return price;
}
char * retname()
{
return name;
}
int retdis()
{
return dis;
}
}; //class ends here
//***************************************************************
// global declaration for stream object, object
//****************************************************************
fstream fp;
product pr;
//***************************************************************
// function to write in file
//****************************************************************
void write_product()
{
fp.open("Shop.dat", ios::out | ios::app);
pr.create_product();
fp.write((char * ) & pr, sizeof(product));
fp.close();
cout << "\n\nThe Product Has Been Created ";
getch();
}
//***************************************************************
// function to read all records from file
//****************************************************************
void display_all()
{
clrscr();
cout << "\n\n\n\t\tDISPLAY ALL RECORD !!!\n\n";
fp.open("Shop.dat", ios:: in );
while (fp.read((char * ) & pr, sizeof(product)))
{
pr.show_product();
cout << "\n\n====================================\n";
getch();
}
fp.close();
getch();
}
//***************************************************************
// function to read specific record from file
//****************************************************************
void display_sp(int n)
{
int flag = 0;
fp.open("Shop.dat", ios:: in );
while (fp.read((char * ) & pr, sizeof(product)))
{
if (pr.retpno() == n)
{
clrscr();
pr.show_product();
flag = 1;
}
}
fp.close();
if (flag == 0)
cout << "\n\nrecord not exist";
getch();
}
//***************************************************************
// function to modify record of file
//****************************************************************
void modify_product()
{
int no, found = 0;
clrscr();
cout << "\n\n\tTo Modify ";
cout << "\n\n\tPlease Enter The Product No. of The Product";
cin >> no;
fp.open("Shop.dat", ios:: in | ios::out);
while (fp.read((char * ) & pr, sizeof(product)) && found == 0)
{
if (pr.retpno() == no)
{
pr.show_product();
cout << "\nPlease Enter The New Details of Product" << endl;
pr.create_product();
int pos = -1 * sizeof(pr);
fp.seekp(pos, ios::cur);
fp.write((char * ) & pr, sizeof(product));
cout << "\n\n\t Record Updated";
found = 1;
}
}
fp.close();
if (found == 0)
cout << "\n\n Record Not Found ";
getch();
}
//***************************************************************
// function to delete record of file
//****************************************************************
void delete_product()
{
int no;
clrscr();
cout << "\n\n\n\tDelete Record";
cout << "\n\nPlease Enter The product no. of The Product You Want To Delete";
cin >> no;
fp.open("Shop.dat", ios:: in | ios::out);
fstream fp2;
fp2.open("Temp.dat", ios::out);
fp.seekg(0, ios::beg);
while (fp.read((char * ) & pr, sizeof(product)))
{
if (pr.retpno() != no)
{
fp2.write((char * ) & pr, sizeof(product));
}
}
fp2.close();
fp.close();
remove("Shop.dat");
rename("Temp.dat", "Shop.dat");
cout << "\n\n\tRecord Deleted ..";
getch();
}
//***************************************************************
// function to display all products price list
//****************************************************************
void menu()
{
clrscr();
fp.open("Shop.dat", ios:: in );
if (!fp)
{
cout << "ERROR!!! FILE COULD NOT BE OPEN\n\n\n Go To Admin Menu to create
File ";
cout << "\n\n\n Program is closing ....";
getch();
exit(0);
}
cout << "\n\n\t\tProduct MENU\n\n";
cout << "====================================================\n";
cout << "P.NO.\t\tNAME\t\tPRICE\n";
cout << "====================================================\n";
while (fp.read((char * ) & pr, sizeof(product)))
{
cout << pr.retpno() << "\t\t" << pr.retname() << "\t\t" << pr.retprice() << endl;
}
fp.close();
}
//***************************************************************
// function to place order and generating bill for Products
//****************************************************************
void place_order()
{
int order_arr[50], quan[50], c = 0;
float amt, damt, total = 0;
char ch = 'Y';
menu();
cout << "\n============================";
cout << "\n PLACE YOUR ORDER";
cout << "\n============================\n";
do
{
cout << "\n\nEnter The Product No. Of The Product : ";
cin >> order_arr[c];
cout << "\nQuantity in number : ";
cin >> quan[c];
c++;
cout << "\nDo You Want To Order Another Product ? (y/n)";
cin >> ch;
} while (ch == 'y' || ch == 'Y');
cout << "\n\nThank You For Placing The Order";
getch();
clrscr();
cout << "\n\n******************************** INVOICE ************************\n";
cout << "\nPr No.\tPr Name\tQuantity \tPrice \tAmount \tAmount after
discount\ n ";
for (int x = 0; x <= c; x++)
{
fp.open("Shop.dat", ios:: in );
fp.read((char * ) & pr, sizeof(product));
while (!fp.eof())
{
if (pr.retpno() == order_arr[x])
{
amt = pr.retprice() * quan[x];
damt = amt - (amt * pr.retdis() / 100);
cout << "\n" << order_arr[x] << "\t" << pr.retname() <<
"\t" << quan[x] << "\t\t" << pr.retprice() << "\t" << amt << "\t\t" << damt;
total += damt;
}
fp.read((char * ) & pr, sizeof(product));
}
fp.close();
}
cout << "\n\n\t\t\t\t\tTOTAL = " << total;
getch();
}
//***************************************************************
// INTRODUCTION FUNCTION
//****************************************************************
void intro()
{
clrscr();
gotoxy(31, 11);
cout << "SUPER MARKET";
gotoxy(35, 14);
cout << "BILLING";
gotoxy(35, 17);
cout << "PROJECT";
cout << "\n\nMADE BY : ANUJ KUMAR";
cout << "\n\nSCHOOL : RYAN INTERNATIONAL SCHOOL";
getch();
}
//***************************************************************
// ADMINSTRATOR MENU FUNCTION
//****************************************************************
void admin_menu()
{
clrscr();
char ch2;
cout << "\n\n\n\tADMIN MENU";
cout << "\n\n\t1.CREATE PRODUCT";
cout << "\n\n\t2.DISPLAY ALL PRODUCTS";
cout << "\n\n\t3.QUERY ";
cout << "\n\n\t4.MODIFY PRODUCT";
cout << "\n\n\t5.DELETE PRODUCT";
cout << "\n\n\t6.VIEW PRODUCT MENU";
cout << "\n\n\t7.BACK TO MAIN MENU";
cout << "\n\n\tPlease Enter Your Choice (1-7) ";
ch2 = getche();
switch (ch2)
{
case '1':
clrscr();
write_product();
break;
case '2':
display_all();
break;
case '3':
int num;
clrscr();
cout << "\n\n\tPlease Enter The Product No. ";
cin >> num;
display_sp(num);
break;
case '4':
modify_product();
break;
case '5':
delete_product();
break;
case '6':
menu();
getch();
case '7':
break;
default:
cout << "\a";
admin_menu();
}
}
//***************************************************************
// THE MAIN FUNCTION OF PROGRAM
//****************************************************************
void main()
{
char ch;
intro();
do
{
clrscr();
cout << "\n\n\n\tMAIN MENU";
cout << "\n\n\t01. CUSTOMER";
cout << "\n\n\t02. ADMINISTRATOR";
cout << "\n\n\t03. EXIT";
cout << "\n\n\tPlease Select Your Option (1-3) ";
ch = getche();
switch (ch)
{
case '1':
clrscr();
place_order();
getch();
break;
case '2':
admin_menu();
break;
case '3':
exit(0);
default:
cout << "\a";
}
} while (ch != '3');
}
//***************************************************************
// END OF PROJECT
//***************************************************************