/*
 * Program to "count out change":
 *
 * Input number of total pennies.
 * Print number of dollars, quarters, dimes, nickels, pennies.
 *
 * Revised version checking for input errors.
 */
#include <stdio.h>

#define DOLLAR_CENTS 100
#define QUARTER_CENTS 25
#define DIME_CENTS 10
#define NICKEL_CENTS 5

int main(void) {
	int remainder;
	int dollars;
	int quarters;
	int dimes;
	int nickels;
	int pennies;

	printf("enter number of pennies:\n");
	if (scanf("%d", &remainder) != 1) {
		printf("not an integer\n");
	}
	else if (remainder < 0) {
		printf("value must not be negative\n");
	} 
	else {
		printf("%d total pennies\n", remainder);

		dollars = remainder / DOLLAR_CENTS;
		printf("%d dollars\n", dollars);
		remainder %= DOLLAR_CENTS;

		quarters = remainder / QUARTER_CENTS;
		printf("%d quarters\n", quarters);
		remainder %= QUARTER_CENTS;

		dimes = remainder / DIME_CENTS;
		printf("%d dimes\n", dimes);
		remainder %= DIME_CENTS;

		nickels = remainder / NICKEL_CENTS;
		printf("%d nickels\n", nickels);
		remainder %= NICKEL_CENTS;

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

	}
	return 0;
}