/*
 * simple example of function with some pointer parameters
 */
#include <stdio.h>

/* comments with definition below */
int q_and_r(int a, int b, int *q, int *r);

/* main program */
int main(void) {
	int x, y;
	int q, r;
	printf("enter ints\n");
	if (scanf("%d %d", &x, &y) == 2) {
		printf("%d %d\n", x, y);
		if (q_and_r(x, y, &q, &r) == 0) {
			printf("%d %d\n", q, r);
		}
		else {
			printf("divisor zero\n");
		}
		return 0;
	}
	else {
		printf("not number\n");
		return 1;
	}
}

/* 
 * store quotient, remainder into *q, *r
 * return 0 if okay or 1 if b==0
 */
int q_and_r(int a, int b, int *q, int *r) {
	if (b == 0) {
		return 1;
	}
	else {
		*q = a / b;
		*r = a % b;
		return 0;
	}
}