#include <stdio.h>
int main()
{
? int a,s,d,f,g;
? a=x+y;
? s=x-y;
? d=x*y;
? f=x/y;
? g=x%y;
? printf("x+y=%d\n",a);???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? 空printf("x-y=%d\n", s);?????????????????????????
? printf("x*y=%d\n", d );?????????????????? 空printf("x/?? y=%d\n",f);? printf("x%y=%d\n", g);???????????????? return 0;
}