应用题 1.  请使用VC6或使用【答题】菜单打开考生文件夹proj2下的工程proj2，其中定义了vehicle类，并派生出motorcar类和bicycle类。然后以motorcar和bicycle作为基类，再派生出motorcycle类。要求将vehicle作为虚基类，避免二义性问题。请在程序中的横线处填写适当的代码并删除横线，以实现上述类定义。此程序的正确输出结果应为：
    80
    150
    100
    1
    注意：只能在横线处填写适当的代码，不要改动程序中的其他内容，也不要删除或移动“// ****found****”。
    #include ＜iostream.h＞
    class vehicle
    {
    private:
    int MaxSpeed;
    int Weight;
    public:
    // *********found**********
    vehicle (int maxspeed, int weight):______
    ～vehicle() {};
    int getMaxSpeed() {return MaxSpeed;}
    int getWeight() {return Weight;}
    };
    // **********found**********
    class bicycle:______ public vehicle
    {
    private:
    int Height;
    public:
    bicycle (int maxspeed, int weight, int height): vehicle (maxspeed, weight), Height (height) {}
    int getHeight () {return Height;};
    };
    // **********found**********
    class motorcar:______ public vehicle
    {
    private:
    int SeatNum;
    public:
    motorcar (int maxspeed, int weight, int seatnum):vehicle (maxspeed, weight), SeatNum (seatnum) {}
    int getSeatNum() {return SeatNum;};
    };
    // **********found**********
    class motorcycle:______
    {
    public:
    motorcycle(int maxspeed, int weight, int height): vehicle (maxspeed, weight), bicycle (maxspeed, weight, height), motorcar (maxspeed, weight, 1) {}
    };
    void main()
    {
    motorcycle a(80,150,100);
    cout ＜＜ a.getMaxSpeed() ＜＜ endl;
    cout ＜＜ a.getWeight() ＜＜ endl;
    cout ＜＜ a.getHeight() ＜＜ endl;
    cout ＜＜ a.getSeatNum() ＜＜ endl;
    }