// --------------------------------------------------------------------
// Polymorphic Bad Guy
// Demonstrates calling member functions dynamically
// --------------------------------------------------------------------
#include <iostream>
using namespace std;

// --------------------------------------------------------------------
// --------------------------------------------------------------------
class Enemy
{
   public:
      Enemy(int damage = 10);
      virtual ~Enemy();
      void virtual Attack() const;
   protected:
      int* mp_Damage;
};

// --------------------------------------------------------------------
// --------------------------------------------------------------------
Enemy::Enemy(int damage)
{
   mp_Damage = new int(damage);
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
Enemy::~Enemy()
{
   cout << "In Enemy destructor, deleting mp_Damage.\n";
   delete mp_Damage;
   mp_Damage = NULL;
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
void Enemy::Attack() const
{
   cout << "An enemy attacks and inflicts " << *mp_Damage << " damage points.";
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
class Boss : public Enemy
{
   public:
      Boss(int multiplier = 3);
      virtual ~Boss();
      void virtual Attack() const;
   protected:
      int* mp_Multiplier;
};

// --------------------------------------------------------------------
// --------------------------------------------------------------------
Boss::Boss(int multiplier)
{
   mp_Multiplier = new int(multiplier);
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
Boss::~Boss()
{
   cout << "In Boss destructor, deleting mp_Multiplier.\n";
   delete mp_Multiplier;
   mp_Multiplier = NULL;
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
void Boss::Attack() const
{
   cout << "A boss attacks and inflicts " << (*mp_Damage) * (*mp_Multiplier)
      << " damage points.";
}

// --------------------------------------------------------------------
// --------------------------------------------------------------------
// --------------------------------------------------------------------
// main - it all begins here
// --------------------------------------------------------------------
int main()
{
   cout << "Calling Attack() on Boss object through pointer to Enemy:\n";
   Enemy* pBadGuy = new Boss();
   pBadGuy->Attack();

   cout << "\n\nDeleting pointer to Enemy:\n";
   delete pBadGuy;
   pBadGuy = NULL;
   
   return 0;
}