// polygon9.cc
#include <iostream>
#include <string>
using namespace std;

class Polygon
{
  public:
    int NumSides;
    Polygon(int sides) {
      cout << "Creating a Polygon" << endl;
      NumSides = sides;
    }
    ~Polygon() {
      cout << "Destroyed Polygon" << endl;
    }
};

class Triangle: public Polygon
{
  public:
    Triangle(): Polygon(3) { 
      cout << "Creating a Triangle" << endl;
    }
    ~Triangle() {
      cout << "Destroyed Triangle" << endl;
    }
};
  
void DeletePolygon(Polygon* poly) {
  delete poly;
}

int main()
{
  cout << "About to create a Triangle on the heap" << endl;
  Triangle* pTriangle = new Triangle;
  cout << "About to destroy the Triangle on the heap" << endl;
  DeletePolygon(pTriangle);
  
  cout << "About to create a Triangle on the stack" << endl;
  Triangle MyTriangle;
  cout << "Triangle on stack about to go out of scope" << endl;
  return 0;
}