Code-A-day : changeMaker

Code-A-Day : changeMaker

This is a rewrite of an assignment I had in my first computer science class. Originally written in Java, this is a from-scratch rewrite in C. I had some trouble with the random number generator, but I finally figured out how to get it to behave. Also, I broke the change-making part into it’s own separate function, which was something I didn’t know how to do the first time I wrote this program.

            /* Change Maker
            ** 2013-06-05
            **
            ** Basic Change maker program to the specifications listed for
            ** assignment at 
            ** http://faculty.kirkwood.edu/pdf/uploaded/262/cs1/sp13/sp13p1-makeChange.pdf
            **  Original assignment written in Java.
            ** This is a self-taught rewrite in C
            **
            ** kiyote23@gmail.com
            */

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

            #define NICKEL 5
            #define DIME 10
            #define QUARTER 25

            int getChange(int price) {
                int change, quarters, dimes, nickels, remainder;
                change = 100 - price;
                remainder = change;
                quarters = remainder/QUARTER;
                remainder = remainder%QUARTER;
                dimes = remainder/DIME;
                remainder = remainder %DIME;
                nickels = remainder/NICKEL;
                printf("Your change is %d cents: %d quarter(s), %d dime(s), %d nickel(s)\n", change, quarters, dimes, nickels);
                return 0;
            }

            int main() {
                int price;
                int r;
                srand(time(NULL));
                r = ((rand() % 20)+1)*5;
                printf ("Enter the price of the item to be bought, in cents: ");
                scanf("%d", &price);
                //printf("You entered %d.\n", price);
                getChange(price);
                printf("Random price: %d\n", r);
                getChange(r);
                return 0;
            }