cs50/cash.c

#include <cs50.h>
#include <stdio.h>

int get_quarters(int cents);
int get_dimes(int cents);
int get_nickels(int cents);

int main(void)
{
    int cents, quarters, dimes, nickels, pennies;

    do
    {
        cents = get_int("Change owed: ");
    }
    while (cents < 0);

    quarters = get_quarters(cents);
    cents = cents % 25;

    dimes = get_dimes(cents);
    cents = cents % 10;

    nickels = get_nickels(cents);

    pennies = cents % 5;

    cents = quarters + dimes + nickels + pennies;
    printf("%i\n", cents);

    return 0;
}

int get_quarters(int cents)
{
    cents /= 25;
    return cents;
}

int get_dimes(int cents)
{
    cents /= 10;
    return cents;
}

int get_nickels(int cents)
{
    cents /= 5;
    return cents;
}