///////////////////////////////////////////////////////////////
//  cloneb.cpp - defines cloning                              //
//  Exam1:Q3                                                 //
//  Jim Fawcett, CSE687 - Object Oriented Design, Spring 05  //
///////////////////////////////////////////////////////////////

#include <string>
#include <iostream>

class clonable
{
public:
  virtual ~clonable() {}
  virtual clonable* clone() = 0;
};

class cloningString : public std::string, public clonable
{
public:
  cloningString(const std::string& s) : std::string(s) {}
  virtual cloningString* clone() { return new cloningString(*this); }
};

void main()
{
  cloningString s = std::string("this is a cloning string");
  std::cout << "\n  " << s.c_str()
            << "\n  size of string is: " << s.size() << " bytes\n";

  cloningString* pClone = s.clone();
  std::cout << "\n  " << pClone->c_str()
            << "\n  size of clone is: " << pClone->size() << " bytes\n";
  delete pClone;

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