8.3 Design a musical jukebox using object-oriented principles.

 

CareerCup这书实在是太不负责任了，就写了个半调子的程序，说是完整版也可以下载到，但是我怎么找不到，谁知道在哪里下载请告诉博主，多谢啦~

 

class Song;

class CD {

public:

// ...

private:

long _id;

string _artist;

set _songs;

};

class Song {

public:

// ...

private:

long _id;

CD _cd;

string _title;

long _length;

};

class Playlist {

public:

Playlist() {};

Playlist(Song song, queue queue): _song(song), _queue(queue) {};

Song getNextSToPlay() {

Song next = _queue.front(); _queue.pop();

return next;

}

void queueUpSong(Song s) {

_queue.push(s);

}

private:

Song _song;

queue _queue;

};

class CDPlayer {

public:

CDPlayer(CD c, Playlist p): _c(c), _p(p) {};

CDPlayer(Playlist p): _p(p) {};

CDPlayer(CD c): _c(c) {};

void playSong(Song s) {}; // ...

Playlist getPlaylist() { return _p; };

void setPlaylist(Playlist p) { _p = p; };

CD getCD() { return _c; };

void setCD(CD c) { _c = c; };

private:

Playlist _p;

CD _c;

};

class User {

public:

User(string name, long id): _name(name), _id(id) {};

string getNmae() { return _name; };

void setName(string name) { _name = name; };

long getID() { return _id; };

void setID(long id) { _id = id; };

User getUser() { return *this; };

static User addUser(string name, long id) {}; // ...

private:

string _name;

long _id;

};

class SongSelector {

public:

Song getCurrentSong() {}; // ...

};

class Jukebox {

public:

Jukebox(CDPlayer cdPlayer, User user, set cdCollection, SongSelector ts): _cdPlayer(cdPlayer), _user(user), _cdCollection(cdCollection), _ts(ts) {};

Song getCurrentSong() {

return _ts.getCurrentSong();

}

void setUser(User u) {

_user = u;

}

private:

CDPlayer _cdPlayer;

User _user;

set _cdCollection;

SongSelector _ts;

};

 

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