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C Program to Calculate Purchase Amount to be Paid after Discount



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In this tutorial, we will learn about how to create a program in C that will ask from user to enter total shopping amount purchased in the shop, and then apply the discount as per the following discount criteria, then find and print the final amount that has to be paid by the customer after subtracting the discount amount:

Let's take a look at the program:

// Write a program in C, which will accept the orignal
// purchase amount and compute the net or final purchase
// amount (after applying discount) that has to be paid
// by the customer for the purchase made by him/her
// The Discount rates are as follows:
//   Purchase Amount     Discount
//   >100 & <=200        5%
//   >200 & <=400        10%
//   >400 & <=800        20%
//   >800                25%
// -----------codescracker.com-----------

#include<stdio.h>
#include<conio.h>
int main()
{
    float amount, discount, amountToBePaid;
    printf("How much shopping amount you have done here ? ");
    scanf("%f", &amount);
    printf("\n");
    if(amount<=100)
    {
        printf("You have to paid: Rs.%0.2f", amount);
    }
    else
    {
        if(amount>100 && amount<=200)
        {
            discount = (amount*5)/100;
            amountToBePaid = amount-discount;
            printf("After applying the discount, you have to paid: Rs.%0.2f", amountToBePaid);
        }
        else if(amount>200 && amount<=400)
        {
            discount = (amount*10)/100;
            amountToBePaid = amount-discount;
            printf("After applying the discount, you have to paid: Rs.%0.2f", amountToBePaid);
        }
        else if(amount>400 && amount<=800)
        {
            discount = (amount*20)/100;
            amountToBePaid = amount-discount;
            printf("After applying the discount, you have to paid: Rs.%0.2f", amountToBePaid);
        }
        else
        {
            discount = (amount*25)/100;
            amountToBePaid = amount-discount;
            printf("After applying the discount, you have to paid: Rs.%0.2f", amountToBePaid);
        }
    }
    getch();
    return 0;
}

As the program was written under Code::Blocks IDE, therefore after successful build and run, here is the output you will get on your output screen. This is the first snapshot of the sample run:

c program calculate purchase amount

Now enter the total amount (original purchase amount) say Rs.150, that is customer has made a purchase of Rs.150 at the shop. Now press ENTER key to see the total cost (final cost) customer has to paid after applying the discount. Here is the second snapshot of the sample run:

calculate purchase amount after discount c

Let's take another sample run. This time, the customer made purchase of Rs.670. Here is the snapshot of the sample run:

c print purchase amount to paid after discount

Here is another sample run, this time, the customer made purchase of Rs.2000:

calculate amount to paid after discount

Here are some of the main steps used in above program:


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