Question

I have three classes – Album, Track, and PlaylistTrack that extends Track.

Track contains a Time object, and two strings for artist and title.
Album contains a vector of Tracks and a string for title.
PlaylistTrack extends Track in that it contains a pointer to the Album it belongs to.

My question is, how can I get that pointer to the Album that contains it in the class PlaylistTrack?

Answer 1

I don’t really understand exactly what you are asking, but it sounds like you want to have a way to get the album from a PlaylistTrack.

class PlaylistTrack : public Track
{
     public:
         PlaylistTrack(Album * owner){ m_owner = owner; }
         Album* getAlbum(){return m_owner;}
     private:
         Album* m_owner;

}

int main()
{

    Album albumA;
    PlaylistTrack newTrack(&albumA);

    //Now the track knows what album it belongs to, but the album does not own the track yet.
    std::cout << "New Track's Album: " << newTrack.getAlbum.getTitle() << std::endl;

    //Now the album owns this track
    albumA.addTrack(newTrack);

    //The PlaylistTrack constructor could add itself to the album if you wanted to I think.

    return 0;
}