The arithmetic operation in language c++

#include<iostream.h>
Void main()
{
int x,y;
char op;
cout<<"enter two numbers\n";
cin>>x>>y;
cout<<"enter the operator\n";
cin >>op;
Switch(op)
{
case '+' : cout <<x<<"+"<<y<<"="<<x+y; break;
case '-' : cout <<x<<"-"<<y<<"="<<x-y; break;
case '*' : cout <<x<<"*"<<y<<"="<<x*y; break;
case '/' : cout <<x<<"/"<<y<<"="<<x/y; break;
case '%' : cout <<x<<"%"<<y<<"="<<x%y; break;
default:cout<<"i don't know the operator:"<<op;
}
}