#include <stdio.h>
int main()
{
??? int x,y;
??? x = 10;
??? y = -3;
??? printf("x+y=%d\n",? 7?? );?
??? printf("x-y=%d\n",? 13? );
??? printf("x*y=%d\n",? -30?? );
??? printf("x/y=%d\n",? -3?? );
??? printf("x%%y=%d\n",? x%y );? //為什么這里“x%y”不能直接寫成1呢
??? return 0;???
}