/*
 * Simple example of while loop -- sum integers from stdin.
 */
#include <stdio.h>

int main(void) {
	int sum = 0;
	int n;
	printf("enter integer values, anything else to end\n");
	/* keep calling scanf to read another value until it fails */
	while (scanf("%d", &n) == 1) {
		sum += n;
	}
	printf("sum is %d\n", sum);
	return 0;
}