3 while循环， 输入int 判断

// while循环， 输入int 判断 

#include <stdio.h>


main() {
    int num;
    int sum = 0;
    int status;

    status = scanf_s("%d", &num);  //如果不是输入int，scanf返回0，如果输入int返回1 

    while (status) {
        sum += num;
        status = scanf_s("%d", &num);   //每次循环都判断
    }
    printf("%d", sum);

}