#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;
}