RobertLarson

class PausedState : public MusicPlayerState {
public:
	PausedState();
	virtual ~PausedState();

	virtual void Play(MusicPlayer * player);
	virtual void Stop(MusicPlayer * player);
};

RobertLarson

PlayingState::PlayingState()
: MusicPlayerState(std::string("Playing")) {
}

PlayingState::~PlayingState() {
}

void PlayingState::Pause(MusicPlayer * player)
{

RobertLarson

class PlayingState : public MusicPlayerState {
public:
	PlayingState();
	virtual ~PlayingState();

	virtual void Pause(MusicPlayer * player);
	virtual void Stop(MusicPlayer * player);
};

RobertLarson

MusicPlayerState::MusicPlayerState(std::string name)
: m_name(name) {

}

MusicPlayerState::~MusicPlayerState() {
}

void MusicPlayerState::Play(MusicPlayer *)

RobertLarson

class MusicPlayerState {
public:
	MusicPlayerState(std::string name);
	virtual ~MusicPlayerState();

	virtual void Play(MusicPlayer * player);
	virtual void Pause(MusicPlayer * player);
	virtual void Stop(MusicPlayer * player);

RobertLarson

MusicPlayer::MusicPlayer()
: m_pState(new StoppedState()){

}

MusicPlayer::~MusicPlayer() {
	delete m_pState;
}

RobertLarson

class MusicPlayer {
public:
	enum State
	{
		ST_STOPPED,
		ST_PLAYING,
		ST_PAUSED
	};

	MusicPlayer();

RobertLarson

int main()
{
    Librarian librarian;

    librarian.DisplayBookCollection();
}

RobertLarson

Librarian::Librarian()
: m_pBookCollection(new BookGroup(std::string("Book Collection")))
{
	BuildBookCollection();
}

Librarian::~Librarian() {
	delete m_pBookCollection;
}

RobertLarson

class Librarian {
public:
	Librarian();
	virtual ~Librarian();

	void DisplayBookCollection();

private:
    void BuildBookCollection();
    BookComponent * BuildFictionGroup();