#include <stdio.h>

int main()

{

    int x,y;

    x = 10;

    y = -3;

    printf("x+y=%d\n", x+y  );  

    printf("x-y=%d\n", x-y );

    printf("x*y=%d\n", x*y   );

    printf("x/y=%d\n", x/y);

    printf("x%y=%d\n", x%y);  

    return 0;    

}

没办法，系统只判断输出结果，只要执行结果是一样的就能过