class FloorButton {
private:
    int floor;
    string buttonText;
    Elevator* pElevator;

public:
    FloorButton();

    FloorButton(string buttonText, Elevator* pElv, int f);

    void press();
};

class Elevator {
private:
    int currentFloor;

public:
    Elevator();

    //假設這棟樓有5層.
    FloorButton *pFloorBtn1;
    FloorButton *pFloorBtn2;
    FloorButton *pFloorBtn3;
    FloorButton *pFloorBtn4;
    FloorButton *pFloorBtn5;

    void setFloor(int n);
    int getFloor();
};