Thread: Calculate the minimum number of coins required to give a user change

Hi there! I'm trying to work out this problem where I have to calculate the minimum number of coins required to give a user change. I compiled my program with no errors. The thing is whenever I input a value, it keeps giving me the value of 4 and I don't know why. Can someone help me with this?

Code:

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


int main(void)
{
    float balAmt;
    
    do
    {
        printf("Amount? $");
        balAmt = get_float() * 100;
    }
    while (balAmt < 0);
    
    
    int coinCounter = 0;
    
    while (balAmt > 0)
    {
    
    while (balAmt >= 25)
        balAmt = balAmt - 25;
        coinCounter++;
    
    while (balAmt >= 10)
        balAmt = balAmt - 10;
        coinCounter++;
        
    while (balAmt >= 5)
        balAmt = balAmt - 5;
        coinCounter++;
        
    while (balAmt >= 1)
        balAmt = balAmt - 1;
        coinCounter++;
        
    printf("%i/n", coinCounter);
    }
    
    return 0;
}

Thanks a bunch! That actually fixed my problem!

Originally Posted by Jason Dang

Thanks a bunch! That actually fixed my problem!

Are you sure? Have you tested it enough? What if you enter 0.15 ?

Hey algorism! Thanks for the heads up. Yea it's behaving odd when I enter 0.15. It keeps spamming 2 in the terminal. Why is that?