A Windows (+) calculator. In C++

main.cpp

#include <osteam>
using namespace std;

int add(x,y)
{
  return x + y;
}

int main()
{
  cout << "Enter 2 number to plus." << endl;
  cout << "-----------------------" << endl;
  
  // the first number to plus
  cout << "1: ";
   int number_one;
    cin >> number_one;
  // the secound number to plus
  cout << "2: ";
   int number_tow;
    cin >> number_tow;
    
  // here comes the resultat
  cout <<"------------------------------" << endl;
  cout << "It will be:" << add(number_one, number_tow) << endl;
  
  return 0;
}