Q 7 : WAP according to the display below :
Open a file named RECORD.txt for 'n' number of data where cost, service charge 5%, VAT 15% and total cost must be calculated by the program itself. [10 Marks]
Code Here :
// This code has been tested in Xcode 7.3
// main.c
// resturentBilling
//
// Created by Notorious MAC on 7/2/16.
// Copyright © 2016 NotoriousMAC. All rights reserved.
//
//WAP to open a file named Record.txt for n number of data where cost, service charge 5%, VAT 15% and total cost must be calculated by program itself.
#include <stdio.h>
#include <stdlib.h> // includes standard library
// structure define here
struct record {
char icode[10];
char des [20];
float rate ;
int qty;
float cost ;
}r;
int main(int argc, const char * argv[]) {
// insert code here...
FILE *fp;
int n,i;
float vat, schar, tcost, t=0;
// open file in write mode
fp=fopen("RECORD.txt", "w");
// check for error here
if (fp == NULL) {
printf("\nFile cannot be opened");
exit(1);
}
printf("\nEnter number of records ");
scanf("%d",&n);
for (i=0; i<n; i++) {
printf("\nEnter itemCode, description, rate and quantity");
scanf("%s%s%f%d",r.icode,r.des,&r.rate,&r.qty);
r.cost = r.rate * r.qty;
fwrite(&r, sizeof(r), 1, fp);
}
fclose(fp);
// open file in read mode
fp = fopen("RECORD.txt", "r");
// check for error here
if (fp == NULL) {
printf("\nFile cannot be opened");
exit(1);
}
printf("\n Item Code \t Description \t Rate \t Quantity \t cost");
while (fread(&r, sizeof(r), 1, fp)==1) {
t=t+r.cost;
printf("\n%s \t\t\t %s \t\t\t %f \t %d \t %f",r.icode,r.des,r.rate,r.qty,r.cost);
}
vat = 0.15*t;
schar = 0.05*t;
tcost = t+vat+schar;
printf("\nVAT = %f",vat);
printf("\Service Charge = %f",schar);
printf("\nTotal cost = %f",tcost);
fclose(fp);
return 0;
}
Output :
Enter number of records 2
Enter itemCode, description, rate and quantitya
as
3.3
4
Enter itemCode, description, rate and quantityb
bs
4.4
5
Item Code Description Rate Quantity cost
a as 3.300000 4 13.200000
b bs 4.400000 5 22.000000
VAT = 5.280000Service Charge = 1.760000
Total cost = 42.239998Program ended with exit code: 0
