The document details a C program for a shopping mall billing system, allowing users to add products, generate bills, display bills, and delete bills. It includes functions for user interaction and file handling, managing product data and customer information. The program provides a text-based menu for operations and structures for managing item and bill information.

1. Computer
Final Review
Fall Semester 2014
By:
• Atit S Gaonkar
14BCE1144
• Siddharth Mohanty
14BME1124

2. Code
#include<stdio.h>
#include<windows.h>
#include<conio.h>
#include<process.h>
#include<stdlib.h>
#include<ctype.h>
#include<dos.h>
#include<string.h>
#include<time.h>
#include<math.h>
void gotoxy(int x, int y)
{
COORD coord;
coord.X = x;
coord.Y = y;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE),coord);
}
struct AddItem
{
int item_id;
char item_name[50];
float price;
};
struct Bill
{
int bill_id;
char cust_name[50];
char item_name[10][50];
float quant[10];
float total;
float price[10];
char date[15];
int n;
};
FILE *fp,*fp1,*bifp,*bifp1;
struct AddItem ad;
struct Bill bi;
int add_item();

3. int generate_bill();
int delete_bill();
int display_bill();
int q=0;
main()
{
int i=1;
system("cls");
printf("nnnnnnttt * * * * * * * * * * * * * * * * * * *");
printf("nnnnttt * SHOPPING MALL BILLING SYSTEM *");
printf("nnnnttt * * * * * * * * * * * * * * * * * * *");
printf("nnttt1.Continuennttt2.EXIT");
printf("nntttEnter Your Option : ");
scanf("%d",&i);
if(i==2)
{
system("cls");
printf("nnnnnnnnnntttt THANKS YOU");
printf("nnntttt Exiting In 3 Secs");
for(int f=1;f<4;f++)
{
printf(" .");
Sleep(600);
printf(" .");
Sleep(600);
printf(" .");
Sleep(600);
system("cls");
exit(0);
}
}
else
{
int f=1,choice;
system("cls");
printf("nnPLEASE WAIT");
for(f=1;f<2;f++)
{
Sleep(600); printf(" .");
Sleep(600);
printf(" .");
Sleep(600);
}
XYZ:

4. system("cls");
printf("ttt ********************************n");
printf("nttt SHOPPING MALL BILLING SYSTEMn");
printf("nttt ********************************");
printf("n-------------------------------------------------------------------------------");
printf("nnt1. ADD PRODUCT");
printf("nnt2. GENERATE A BILL");
printf("nnt3. DISPLAY A BILL");
printf("nnt4. DELETE A BILL");
printf("nnt5. EXIT");
printf("n-------------------------------------------------------------------------------");
printf("nnENTER CORRESPONDING KEYS TO PERFORM
OPERATION :- ");
ABC:
scanf("%d",&choice);
switch(choice)
{
case 1:
q=add_item();
if(q==2)
{
system("cls");
printf("nnnnnnnnnntttt THANK YOU");
Sleep(1800);
exit(0);
}
else
{
system("cls");
goto XYZ;
}
break;
case 2:
q=generate_bill();
if(q==2)
{
system("cls");
printf("nnnnnnnnnntttt THANK YOU");
Sleep(1800);
exit(0);
}
else

5. {
system("cls");
goto XYZ;
}
break;
case 3:
q=display_bill();
if(q==2)
{
system("cls");
printf("nnnnnnnnnntttt THANK YOU");
Sleep(1800);
exit(0);}
else
{
system("cls");
goto XYZ;
}
break;
case 4:
q=delete_bill();
if(q==2)
{
system("cls");
printf("nnnnnnnnnntttt THANK YOU");
Sleep(1800);
exit(0);
}
else
{
system("cls");
goto XYZ;
}
case 5:
system("cls");
printf("nnnnnnnnnntttt THANK YOU");
Sleep(1800);
exit(0);
default:
printf("nntYOU ENTERED A WRONG
VALUE.PLEASE TRY AGAIN : ");
goto ABC;
}
}

6. getch();
}
int add_item()
{
int f=1,id=0,p[10],i=0,h=0,t=0;
fp=fopen("Products.txt","a");
fclose(fp);
system("cls");
while(f==1)
{
system("cls");
fp=fopen("Products.txt","r");
while((fread(&ad,sizeof(ad),1,fp))==1)
{
id=ad.item_id;
}
fclose(fp);
printf("ntENTER PRODUCT NAME :-t");
scanf("%s",ad.item_name);
printf("ntENTER PRODUCT PRICE :-t");
scanf("%f",&ad.price);
id++;
p[i]=id;
i++;
ad.item_id=id;
fp=fopen("Products.txt","a");
fwrite(&ad,sizeof(ad),1,fp);
fclose(fp);
printf("nnnntYOUR PRODUCT WITH ID %d IS ADDED
SUCCESSFULLY....",ad.item_id);
printf("nnt 1. TO ADD NEW PRODUCT 2. TO EXIT...t");
printf("nntEnter Your Choice : ");
scanf("%d",&f);
if(f!=1)
{
break;
}
}
system("cls");
i=0;
fp=fopen("Products.txt","r");
while((fread(&ad,sizeof(ad),1,fp))==1)
{
if(p[i]==ad.item_id)

7. {
printf("ntPRODUCT ID :- %d",ad.item_id);
printf("ntPRODUCT NAME :- %s",ad.item_name);
printf("ntPRODUCT PRICE :- %f",ad.price);
printf("nn");
i++;
}
}
fclose(fp);
printf("nnt 1. TO GO TO MENU PAGE nnt2. TO EXIT :-t");
scanf("%d",&q);
return q;
}
int generate_bill()
{
time_t now;
struct tm *d;
int w=0;
int item_id,f=1,i=0,n=0,p=0,bill_id=0,k=1,j=0;
float total=0,quant=0;
bifp=fopen("GBill.txt","a");
fclose(bifp);
while(f==1)
{
int flag=0;
system("cls");
if(j==0)
{
bifp=fopen("GBill.txt","r");
while((fread(&bi,sizeof(bi),1,bifp))==1)
{
bill_id=bi.bill_id;
}
bill_id++;
bi.bill_id=bill_id;
fclose(bifp);
j++;
}
printf("tNOTE :- JUST ENTER PRODUCT ID OF BUYING PRODUCTS
TO CALCULATE BILL");
printf("nntPRODUCT ID :-t");
scanf("%d",&item_id);
fp=fopen("Products.txt","r");

8. while((fread(&ad,sizeof(ad),1,fp))==1)
{
if(item_id==ad.item_id)
{
printf("nntPRODUCT NAME :- %s",ad.item_name);
strcpy(bi.item_name[i],ad.item_name);
printf("tPRODUCT PRICE :- %f",ad.price);
bi.price[i]=ad.price;
printf("nn");
flag=1;
}
}
if(flag==0)
{
printf("nntYOUR PRODUCT ID IS NOT FOUND.");
}
else
{
printf("nntQUANTITY OF PRODUCT :-t");
scanf("%f",&quant);
bi.quant[i]=quant;
total=total+quant*ad.price;
bi.total=total;
flag=0;
bi.n=i;
n=i;
i++;
}
fclose(fp);
printf("nnnt 1. TO ADD MORE PRODUCT nnnt2. TO GO TO BILL
PAGE : ");
scanf("%d",&f);
}
system("cls");
printf("ntPUT DOWN CUSTOMER INFORMATION .....");
printf("nntCUSTOMER NAME :- ");
scanf("%s",&bi.cust_name);
time(&now);
d=localtime(&now);
strftime(bi.date, 15, "%d/%m/%Y", d);
printf("nnnt 1. TO GENERATE A BILL nnt2. TO GO TO MAIN MENU : ");
scanf("%d",&p);
if(p!=1)

9. {
return p;
}
else
{
i=0;
bifp=fopen("GBill.txt","a");
fwrite(&bi,sizeof(bi),1,bifp);
fclose(bifp);
system("cls");
printf("nntBILL IS BEING GENERATED");
printf("nntPlesase Wait");
for(p=0;p<3;p++)
{
Sleep(500);
printf(" .");
Sleep(500);
printf(" .");
Sleep(500);
printf(" .");
Sleep(500);
system("cls");
}
printf("nnttt ********************************n");
printf("nttt SHOPPING MALL BILLING SYSTEMn");
printf("nttt ********************************");
printf("n----------------------------------------------------");
gotoxy(2,5);
printf("CUSTOMER NAME : %s",bi.cust_name);
gotoxy(36,5);
printf("BILL ID : %d",bi.bill_id);
gotoxy(62,5);
printf("DATE : %s",bi.date);
printf("n----------------------------------------------------");
gotoxy(4,7);
printf("SrNo.");
gotoxy(12,7);
printf("ITEM NAME");
gotoxy(32,7);
printf("PRICE");
gotoxy(53,7);
printf("QUANTITY");
gotoxy(70,7);
printf("TOTAL");

10. total=0;
for(i=0;i<=n;i++)
{
Sleep(200);
gotoxy(5,w+9);
printf("%d",i+1);
gotoxy(14,w+9);
printf("%s",bi.item_name[i]);
gotoxy(31,w+9);
printf("%f",bi.price[i]);
gotoxy(53,w+9);
printf("%f",bi.quant[i]);
gotoxy(68,w+9);
printf("%f",bi.price[i]*bi.quant[i]);
total=total+(bi.price[i]*bi.quant[i]);
w=w+2;
}
Sleep(200);
printf("n-----------------------------------------------------");
gotoxy(14,w+9);
printf("TOTAL");
gotoxy(66,w+9);
printf("%f Rs",total);
printf("n-------------------------------------------------------");
Sleep(200);
printf("nnt1. TO GO TO MAIN MENU nnt2. TO EXIT ");
printf("nntEnter Your Choice : ");
scanf("%d",&q);
return q;
}
}
int display_bill()
{
int w=0,p=0;
int item_id,f=0,i=0,bill_id=0;
float total;
system("cls");
printf("nntPLEASE ENTER YOUR BILL-ID :- ");
scanf("%d",&bill_id);
bifp=fopen("GBill.txt","a");
fclose(bifp);
bifp=fopen("GBill.txt","r");
while((fread(&bi,sizeof(bi),1,bifp))==1)
{

11. if(bill_id==bi.bill_id)
{
f=1;
system("cls");
for(p=0;p<3;p++)
{
printf("nntSEARCHING");
Sleep(500);
printf(" .");
Sleep(500);
printf(" .");
Sleep(500);
printf(" .");
Sleep(500);
system("cls");
}
printf("nnttt ********************************n");
printf("nttt SHOPPING MALL BILLING SYSTEMn");
printf("nttt ********************************");
printf("n-------------------------------------------------------------");
gotoxy(2,5);
printf("CUSTOMER NAME : %s",bi.cust_name);
gotoxy(36,5);
printf("BILL ID : %d",bi.bill_id);
gotoxy(62,5);
printf("DATE : %s",bi.date);
printf("n-----------------------------------------------------------");
gotoxy(4,7);
printf("SrNo.");
gotoxy(12,7);
printf("ITEM NAME");
gotoxy(32,7);
printf("PRICE");
gotoxy(53,7);
printf("QUANTITY");
gotoxy(70,7);
printf("TOTAL");
total=0;
for(i=0;i<=bi.n;i++)
{
Sleep(200);
gotoxy(5,w+9);
printf("%d",i+1);

12. gotoxy(14,w+9);
printf("%s",bi.item_name[i]);
gotoxy(31,w+9);
printf("%f",bi.price[i]);
gotoxy(53,w+9);
printf("%f",bi.quant[i]);
gotoxy(68,w+9);
printf("%f",bi.price[i]*bi.quant[i]);
total=total+(bi.price[i]*bi.quant[i]);
w=w+2;
}
Sleep(200);
printf("n-------------------------------------------------------------");
gotoxy(14,w+9);
printf("TOTAL");
gotoxy(66,w+9);
printf("%f Rs",total);
printf("n-------------------------------------------------------------");
break;
}
}
if(f==0)
{
printf("nntSORRY, YOUR BILL-ID DOES NOT MATCH");
}
fclose(bifp);
Sleep(200);
printf("nntPRESS 1 TO GO TO MAIN MENU nn2. TO EXIT :- ");
scanf("%d",&q);
return q;
}
int delete_bill()
{
int item_id,f=0,i=0,bill_id=0;
system("cls");
bifp=fopen("GBill.txt","w");
fclose(bifp);
printf("nPLEASE ENTER YOUR BILL-ID :- ");
scanf("%d",&bill_id);
bifp=fopen("GBill.txt","r");
while(fread(&bi,sizeof(bi),1,bifp)==1)
{
if(bi.bill_id==bill_id)

13. {
f=1;
break;
}
}
fclose(bifp);
if(f==1)
{
bifp=fopen("GBill.txt","r");
bifp1=fopen("GBill_1.txt","w");
while((fread(&bi,sizeof(bi),1,bifp))==1)
{
fwrite(&bi,sizeof(bi),1,bifp1);
}
fclose(bifp);
fclose(bifp1);
bifp=fopen("GBill.txt","w");
bifp1=fopen("GBill_1.txt","r");
while((fread(&bi,sizeof(bi),1,bifp1))==1)
{
if(bi.bill_id!=bill_id)
{
fwrite(&bi,sizeof(bi),1,bifp);
}
}
fclose(bifp1);
fclose(bifp);
printf("nntYOUR BILL HAS BEEN DELETED SUCCESSFULLY.");
}
else
{
printf("nntSORRY, YOUR BILL-ID DOES NOT MATCH.");
}
printf("nntPRESS 1. TO GO TO MAIN MENU nnt2. TO EXIT :- ");
scanf("%d",&q);
return q;
}

14. Output