#include <iostream>
 
using namespace std;
 
struct Beverage
{
  static int last;
  int i;
  Beverage() : i(++last) {}
  virtual ~Beverage() { cout << "~Beverage #" << i << endl;  }
};
 
int Beverage::last = 0;
 
struct DarkRoast : Beverage
{
  virtual ~DarkRoast() { cout << "~DarkRoast #" << i << endl; }
};
 
struct Whip : Beverage
{
  Beverage &p;
  Whip(Beverage &p) : p(p) {};
  virtual ~Whip() { cout << "~Whip #" << i << endl; delete &p; }
};
 
int main()
{
  Beverage * beverage2 = new DarkRoast();
  beverage2 = new Whip(*beverage2);
  delete beverage2;
 
  return 0;
}

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