/*
 * Very very simple program illustrating use of conditional execution
 * and a function.
 */
#include <stdio.h>

/* function declaration */

int main(void) {
	int x, y;
	printf("enter two integers\n");
	if (scanf("%d %d", &x, &y) == 2) {
		int z = add(x, y);
		printf("x, y, z %d %d %d\n", x, y, z);
		return 0;
	}
	else {
		printf("input error\n");
		return 1;
	}
}

/* function definition */
int add(int a, int b) {
	return a + b;
}