/*
 * Program to count out change:
 * Given a number of pennies, show dollars, quarters, etc.
 */
#include <stdio.h>

/* 
 * give names to constant values -- could just use values but
 * this is arguably more readable (for humans)?
 */
#define DOLLAR_CENTS 100
#define QUARTER_CENTS 25
#define DIME_CENTS 10
#define NICKEL_CENTS 5

int main(void) {
	printf("how many pennies?\n");
	int pennies;
	scanf("%d", &pennies);
	printf("input:  %d pennies\n", pennies);

	/* factor out dollars first, then quarters, etc. */

	int dollars = pennies/DOLLAR_CENTS;
	printf("%d dollars\n", dollars);
	pennies = pennies - dollars*DOLLAR_CENTS;

	int quarters = pennies/QUARTER_CENTS;
	printf("%d quarters\n", quarters);
	pennies = pennies - quarters*QUARTER_CENTS;

	int dimes = pennies/DIME_CENTS;
	printf("%d dimes\n", dimes);
	pennies = pennies - dimes*DIME_CENTS;

	int nickels = pennies/NICKEL_CENTS;
	printf("%d nickels\n", nickels);
	pennies = pennies - nickels*NICKEL_CENTS;

	printf("%d pennies\n", pennies);

	return 0;
}