//////////////////////////////////////////////
// MT3Q3.cpp - static creational function

#include <iostream>

class IOp
{
public:
  virtual ~IOp() {}
  virtual void op() = 0;
  static IOp* Create();
};

class Op : public IOp
{
public:
  void op() { std::cout << "\n  " << typeid(*this).name() << "::op() call"; }
};

IOp* IOp::Create() { return new Op(); }

void main()
{
  IOp* pIOp = IOp::Create();
  pIOp -> op();

  std::cout << "\n\n";
}