/*
 * Program to add numbers from input.
 *
 * Input:  Zero or more integers, read from standard input, terminated
 *   by anything other than a number. 
 *
 * Output:  Sum of input numbers (zero if none).
 */
#include <stdio.h>

int main(void) {

	int input;
	int sum = 0;

	printf("enter numbers to add, non-number to end:\n");

	while (scanf("%d", &input) == 1) {
		sum += input;
	}
	printf("result is %d\n", sum);

	return 0;
}