TestNo1Ex1

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>

int main() {
    int num;
    int sum = 0;
    int temp = 0;
    while(scanf("%d", &num) != EOF) {
        while(num != 0) {
            temp = num%10;
            sum += temp;
            num = num/10;
        }
    }
    printf("Sum: %d\n", sum);
    return 0;
}