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motocycle类。要求将vehicle作为虚基类，避免二义性问题。请在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： A vehicle is running! A vehicle has stopped! A bicycle is running! A bicycle has stopped! A motorcar is running! A motocycle is running! 注意：只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: vehicle(): MaxSpeed(0), Weight(0){ vehicle(int max_speed, int weight): MaxSpeed (max_speed ), Weight (weight)(} //********** found********** ______Run() { cout ＜＜ "Avehicle is running!" ＜＜ endl; } //********** found********** ______Stop() { cout ＜＜ "A vehicle has stopped!" ＜＜ endl; } }; class bicycle : virtual public vehicle { private: int Height; public: bicycle(): Height(0){} bicycle(int max_speed, int weight,int height) :vehicle (max_speed, weight), Height(height){}; void Run () {cout ＜＜ "A bicycle isrunning!" ＜＜ endl; } void Stop() {cout ＜＜ "Abicycle hasstopped!" ＜＜ endl; } }; class motorcar : virtual public vehicle { private: int SeatNum; public: motorcar(): SeatNum(0) {} motorcar (int max_speed, intweight, int seat_num) //********** found********** :______{} void Run() {cout ＜＜ "A motorcar isrunning!" ＜＜ endl; } void Stop () {cout ＜＜ "A motorcarhas stopped!" ＜＜ endl; } }; //********** found********** class motorcycle: ______ { public: motorcycle(){} motorcycle (int max_speed, int weight, int height, int seet_num):bicycle(max_speed, weight, height), motorcar (max_speed, weight, seet_num){}; ～motorcycle () {}; void Run () {cout ＜＜ "A motorcycle is running!" ＜＜ endl; } void Stop() {cout ＜＜ "A motorcycle has stopped!" ＜＜ endl; } }; int main() { vehicle * ptr; vehicle a; bicycle b; motorcar c; motorcycle d; a.Run(); a. Stop(); b.Run(); b. Stop(); ptr = &c; ptr-＞Run(); ptr = &d; ptr-＞Run(); return 0; }