/**
 * Program to sum integers.
 */
#include <stdio.h>

int main(void) {

    int input;
    int sum = 0;

    printf("enter some integers, non-integer to stop\n");

    while(scanf("%d", &input) == 1) {
        sum += input;
    }

    printf("sum is %d\n", sum);
    return 0;
}