C Program to Determine Purchase Amount After Discount

In this post, we will learn about how to create a program in C that will ask the user to enter the 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:

#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: %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: %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: %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: %0.2f", amountToBePaid);
        }
        else
        {
            discount = (amount*25)/100;
            amountToBePaid = amount-discount;
            printf("After applying the discount, you have to paid: %0.2f", amountToBePaid);
        }
    }
    getch();
    return 0;
}

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

c program calculate purchase amount

Now enter the total amount (the original purchase amount), say $150. That is, the customer has made a purchase of $150 at the shop. Now press the ENTER key to see the total cost (final cost) the customer has to pay 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 a purchase of $670. Here is a snapshot of the sample run::

c print purchase amount to paid after discount

Here is another sample run, this time from a customer purchase made in $2000:

calculate amount to paid after discount

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

C Quiz


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