迷宫 工厂模式练习 编译通过

#include <iostream> 
using namespace std; 

enum Direction { 
    North, 
    East, 
    South, 
    West, 
}; 

class MapSite { 
public: 
    virtual void Enter() = 0; 
}; 

class Room : public MapSite { 
public: 
    Room(int roomNo):_roomNumber(roomNo) {}; 

    MapSite *GetSide(Direction) const; 

    virtual void SetSide(Direction direction, MapSite *) { 
        cout << "Set the " 
            << _roomNumber 
            << " room " 
            << direction 
            << " side." 
            << endl; 
    }; 

    int GetRoomNo() { 
        return _roomNumber; 
    }; 

    virtual void Enter() { 
        cout << "Enter the Room." << endl; 
    }; 

private: 
    MapSite *_sides[4]; 
    int _roomNumber; 
}; 

class Wall : public MapSite { 
public: 
    Wall() {}; 

    virtual void Enter() { 
        cout << "Enter the wall." << endl; 
    }; 

}; 

class Door : public MapSite { 
public: 
    Door(Room* = 0, Room* = 0) {}; 

    virtual void Enter() { 
        cout << "Enter the door." << endl; 
    }; 
    Room *OtherSideFrom(Room*) {}; 

private: 
    Room *_room1; 
    Room *_room2; 
    bool _isOpen; 
}; 

class Maze { 
public: 
    Maze() {}; 

    void AddRoom(Room* room) { 
        cout << "Add the room" << room->GetRoomNo() << "." << endl; 
    }; 
    Room* RoomNo(int) const{}; 
}; 

//以下为工厂模式不同地方
class MazeFactory { 
public: 
    MazeFactory() {}; 

    virtual Maze* MakeMaze() const { 
        return new Maze; 
    }; 

    virtual Wall* MakeWall() const { 
        return new Wall; 
    }; 

    virtual Room* MakeRoom(int n) const { 
        return new Room(n); 
    }; 

    virtual Door* MakeDoor(Room* r1, Room* r2) const { 
        return new Door(r1, r2); 
    }; 
}; 

class MazeGame { 
public: 
    Maze* CreateMaze(MazeFactory &factory) { 
        Maze* aMaze = factory.MakeMaze(); 
        Room* r1 = factory.MakeRoom(1); 
        Room* r2 = factory.MakeRoom(2); 
        Door* theDoor = factory.MakeDoor(r1, r2); 

        aMaze->AddRoom(r1); 
        aMaze->AddRoom(r2); 

        r1->SetSide(North, factory.MakeWall()); 
        r1->SetSide(East, theDoor); 
        r1->SetSide(South, factory.MakeWall()); 
        r1->SetSide(West, factory.MakeWall()); 

        r2->SetSide(North, factory.MakeWall()); 
        r2->SetSide(East, factory.MakeWall()); 
        r2->SetSide(South, factory.MakeWall()); 
        r2->SetSide(West, theDoor); 

        return aMaze; 
    }; 
}; 

int main() { 
    MazeGame mygame; 
    MazeFactory factory; 
    mygame.CreateMaze(factory); 
    system("pause");
    return 0; 
}