#include <stdio.h>
int main()
{
??? int x,y;
??? int A;
??? int B;
??? int C;
??? int D;
??? int E;
??? A=x+y
??? B=x-y
??? C=x*y
??? D=x/y
??? E=x%y
??? x = 10;
??? y = -3;
??? 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; }