Example how to use function

function_example.c

#include <stdio.h>
#include <stdlib.h>

/********************* price_after_discount() ***********************
 * Find the price of an item after the discount
 *
 * @argument1: price    = item price.
 * @argument2: discount = percentage of discount.
 *
 * @return: item price after discount
 */
double price_after_discount(double price, double discount)
{
    double new_price = 0.00;

    /** calculate price after discount */
    new_price = price - (price*(discount/100));

    return new_price;
}

int main(void)
{
    double coffee_price     = 32.90; /* RM 32.90 */
    double coffee_discount  = 75.00; /* 75.00% */
    double coffee_new_price = 0.00;

    coffee_new_price =
        price_after_discount(coffee_price, coffee_discount);

    printf("Coffee: RM%.2f\n",coffee_new_price);

    return 0;
}