// polygon6a.cc
#include <iostream>
#include <string>
using namespace std;

class Polygon
{
  public:
    int NumSides;
    void Draw(void) {
      cout << "Drawing polygon with " << NumSides << " sides." << endl;
    }
    void Draw(string message) {
      cout << "Drawing polygon with " << NumSides << " sides" << endl;
      cout << "and writing " << message << " inside" << endl;
    }
    Polygon(int sides) {
      NumSides = sides;
    }
};

class Triangle: public Polygon
{
  public:
    Triangle(): Polygon(3) { // Call base class constructor with required args
    }
    void Draw(void) { // This routine overrides the base class Draw() routine
      cout << "Using special triangle drawing routine" << endl;
    }
};
  
int main()
{
  Triangle MyTriangle;
  Polygon MyPentagon(5);
  MyPentagon.Draw("Hello"); // uses generic Polygon::Draw() routine
  MyTriangle.Polygon::Draw("Hi"); // now this will work
}