#include "boost/smart_ptr.hpp"
#include <memory>
#include <iostream>
#include <string>

// If this is true, then the function DisplayAndPlay, takes smart pointers as arguments, otherwise it takes "raw pointers"
#define PASS_SMART_PTR 1

using namespace std;           

#if defined(WIN32) || defined( __NT__)

ostream& operator << ( ostream& strm, const string &str) {
  strm << str.c_str();
  return strm;
}

#endif

class MusicProduct {
protected:
  std::string _title;
public:
  MusicProduct( const string& Title) {
    _title = Title;
  }

  const std::string& get_title() const {
    return _title;
  }

  virtual void play() const = 0;

  virtual void displayTitle() const = 0;

  virtual ~MusicProduct() = 0;
};

MusicProduct::~MusicProduct() { 
}

class Cassette : public MusicProduct {
public:
  Cassette( const string& Title) : MusicProduct( Title) {}

  virtual void play() const {
    cout << "Playing " << _title << " in the tape player" << endl;
  }

  virtual void displayTitle() const {
    cout << "Cassette has title = " << _title << endl;
  }

  virtual ~Cassette() {
    cout << "destroying the cassette named " << _title << endl;
  }
};

class CD : public MusicProduct {
public:
  CD( const string& Title) : MusicProduct( Title) {}

  virtual void play() const {
    cout << "Playing " << _title << " in the CD player" << endl;
  }

  virtual void displayTitle() const {
    cout << "CD has title = " << _title << endl;
  }

  virtual ~CD() {
    cout << "destroying the CD named " << _title << endl;
  }
};

#if PASS_SMART_PTR

void DisplayAndPlay( boost::shared_ptr<MusicProduct> smarty, int HowMany) {
  smarty->play();
  cout << HowMany << " are in stock" << endl;
}

int main() {
  boost::shared_ptr<Cassette> DiscoGold( new Cassette("DiscoGold"));
  boost::shared_ptr<CD> Yani( new CD("Yani's Best"));

  DisplayAndPlay( DiscoGold, 10);
  DisplayAndPlay( Yani, 5);
  DisplayAndPlay( DiscoGold, 10);

  cout << "starting cleanup" << endl;

  return 0;
}

#else

void DisplayAndPlay( const MusicProduct* smarty, int HowMany) {
  smarty->play();
  cout << HowMany << " are in stock" << endl;
}

int main() {
  boost::shared_ptr<Cassette> DiscoGold( new Cassette("DiscoGold"));
  boost::shared_ptr<CD> Yani( new CD("Yani's Best"));

  DisplayAndPlay( DiscoGold.get(), 10);
  DisplayAndPlay( Yani.get(), 5);
  DisplayAndPlay( DiscoGold.get(), 10);

  cout << "starting cleanup" << endl;

  return 0;
}

#endif