[HELP]non-hack related c++

cout << " please enter the first number you'd like to calculate " << endl ; // the first number you type in

// pew pew calculator.cpp : main project file.

#include "stdafx.h"
#include <iostream>
using namespace std ;
int main ()
{

   
   char response ;
   int firstnumber ; 
   int secondnumber ; 
   cout << " please enter the first number you'd like to calculate " << endl ; // the first number you type in
    cin>> firstnumber ; // hit enter
   cout << " please enter which operation you wanna do "<< endl ; // +, -, dev etc.
   cin >> response ; // hit enter agin
   cout << " please enter the second number you'd like to calculate " << endl ; // the second number you type in
   cin >> secondnumber ;
   if (response == '+'){
   cout << firstnumber << " + " << secondnumber << " = " << firstnumber+secondnumber << endl ; 
   };
   if (response == '-'){
   cout << firstnumber << " - " << secondnumber << " = " << firstnumber-secondnumber << endl ; 
   };
   if (response == '*'){
   cout << firstnumber << " * " << secondnumber << " = " << firstnumber*secondnumber << endl ; 
   };
   if (response == '/'){
   cout << firstnumber << " / " << secondnumber << " = " << firstnumber/secondnumber << endl ; 
   cout << " and the remainder fot the devision would be " << firstnumber%secondnumber<< endl ; 
   };
   
   char f ;
   cin >> f ;
   return 0 ;
}