没有两个%号也是对的？
#include <stdio.h>
int main()
{
int x,y,a,b,c,d,e;
x = 10;
y = -3;
a=x+y;
b=x-y;
c=x*y;
d=x/y;
e=x%y;
printf("x+y=%d\n", a );
printf("x-y=%d\n", b );
printf("x*y=%d\n", c );
printf("x/y=%d\n", d );
printf("x%%y=%d\n", e );
return 0;
}
