Thread: Basic Calc

I am new here and I am new to C++... been slowly picking things up. I created a Basic Calc program and I was wonder what you guys think on how its writen. I know its a little extreme for a basic calc but I wanted to make it transferable and upgradable as much as possible.

Code:

#include <iostream>

class Math  //Math object that has all the basic math functions
{
public:
  int Add() const { return numx + numy; }
  int Sub() const { return numx - numy; }
  int Div() const { return numx / numy; }
  int Mult() const { return numx * numy; }
  void SetXY();
private:
  int numx;
  int numy;
};

void Math::SetXY()   //Prompts for X and Y
{
  cout << "\nx:";
  cin >> numx;
  cout << "y:";
  cin >> numy;
};

int main()
{
  using namespace std;
 int menu();
 int answer(int ans);
 int select(unsigned short int sel);
 unsigned short int sel = 0;

 for (;sel != 5;)                                                         //Main Loop of Program
   {
     select(menu());  //Calling Menu function and passes it to the Select Function
   }
 return 0;                                                              //Exits Program
}


//Printing a menu on the screen and asking for a selection.
int menu()
{
  unsigned short int select = 0;
  for (;;)
    {
      cout << "1. Add\n";
      cout << "2. Subtract\n";
      cout << "3. Divide\n";
      cout << "4. Mutiple\n";
      cout << "5. Exit.\n";
      cout << "\nSelect one:";
      cin >> select;
      if (select > 5)	
	  cout << "Invalid Selection, try again.\n";
      else
	break;
    }
  return select;
}

//Prints the Answer
int answer(int ans)
{
  cout << "\nAnswer: " << ans << "\n";
}

//Checking select to excute the correct function of object NewMath
int select(unsigned short int sel)
{
  Math *NewMath = new Math;  //Creates math object on the heap
  switch (sel)
    {
    case 5: cout << "Exiting...\n"; //Exiting Program
      break;
    case 4: cout << "Mutilping...\n";  //Calling Mutilpe Function
      NewMath->SetXY();
      answer(NewMath->Mult());
      break;
    case 3: cout << "Dividing...\n";  //Calling Divide Function
      NewMath->SetXY();
      answer(NewMath->Div());     
      break;
    case 2: cout << "Subtracting...\n";  //Calling Subtract Function
      NewMath->SetXY();
      answer(NewMath->Sub());
      break;
    case 1: cout << "Adding...\n";  //Calling Add Function 
      NewMath->SetXY();
      answer(NewMath->Add());
    }
  delete NewMath; //Delete Math object
}