/////////////////////////////////////////////////////////////////////
// MT4Q1.cpp

#include <string>
#include <iostream>
#include <sstream>

class B
{ 
public: 
  virtual ~B() {}
  virtual const char* say() { return "B instance"; } 
};

class D : public B
{
  virtual const char* say() { return "D instance"; }
};

B* f() { return new D; }

void main()
{
  std::cout << "\n  Creating an instance of D on the C++ heap ";
  std::cout << "\n  and binding to a B reference";
  D d;
  B& b = *f();
  std::cout << "\n  " << b.say();
  delete &b;

  std::cout << "\n\n";
}
  Creating an instance of D on the C++ heap 
  and binding to a B reference
  D instance