#include <iostream.h>

class Shape { public: virtual ~Shape(){}; 
    public:
    virtual void ShowType()
    {
      cout << "Shape" << endl;
    }
};

class Polygon : public Shape { 
    public:
    virtual void ShowType()
    {
      cout << "Polygon" << endl;
    }
};

class Circle : public Shape { 
    public:
    virtual void ShowType()
    {
      cout << "Circle" << endl;
    }
};

int main() {
  Circle circle;
  Polygon polygon;
  
  Shape *shape1 = &circle;
  shape1->ShowType();
  
  Shape *shape2  = &polygon;
  shape2->ShowType();
  
}