/*
 * Sample solution for a beginning C exercise to write multiply functions.
 */

#include <stdio.h>

/*
 * Return m*n.
 * Computes the product iteratively with a for-loop.
 */
int
mult_for(int m, int n)
{
	int result = 0;
	int i;

	for (i = n; i > 0; i -= 1)
		result += m;
	return (result);
}

/*
 * Return m*n.
 * Computes the product iteratively with a while-loop.
 */
int
mult_while(int m, int n)
{
	int result = 0;
	int i = n;

	while (i > 0) {
		result += m;
		i -= 1;
	}
	return (result);
}

int
main(void)
{
	int m = 3;
	int n = 5;

	printf("%d * %d is %d = %d.\n",
	    m, n, mult_for(m, n), mult_while(m, n));
	return (0);
}