声明一个车(vehicle)基类,具有MaxSpeed、weight等成员变量有Run、Stop等成员函数解析.doc

实验九 多态性与虚函数（2） 一、实验目的和要求 了解多态的概念； 了解虚函数的作用及使用方法； 了解静态关联和动态关联的概念和用法； 了解纯虚函数和抽象类的概念和用法 二、实验内容和结果 声明一个车（vehicle）基类，具有MaxSpeed、weight等成员变量有Run、Stop等成员函数，由此派生出自行车（bicycle）类、汽车（motorcar）类，自行车（bicycle）类有高度（Height）等属性，汽车（motorcar）有座位数（SeatNum）等属性，类从bicycle和motorcar派生出摩托车（motorcycle）类，它们都有Run、Stop等成员函数，使用虚函数完成。（各个类都必须定义构造函数和析构函数） #include iostream using namespace std; class vehicle { protected: float MaxSpeed; float weight; public: ~vehicle(){} vehicle(float m,float w):MaxSpeed(m),weight(w){} virtual void Run () { cout车已经启动啦！！！endlendl; } virtual void Stop () { coutvehicle已经停啦！！！endl; } }; class bicycle: virtual public vehicle { protected: float Height; public: ~bicycle(){} bicycle(float m,float w,float h):vehicle( m,w),Height(h){} void Run () { coutThe height of bicycle is:Heightendlendl; } void Stop () { coutbicycle已经停啦！！！endl; } }; class motorcar: virtual public vehicle { protected: int SeatNum; public: ~motorcar(){} motorcar(float m,float w,float s):vehicle( m,w),SeatNum(s){} void Run () { coutThe number of motorcars seat is:SeatNumendlendl; } void Stop () { coutmotorcar已经停啦！！！endl; } }; class motorcycle: public bicycle, public motorcar { public: ~motorcycle(){} motorcycle(float m,float w,float h,float s):vehicle( m,w),bicycle( m,w,h), motorcar(m,w,s){} void Run () { coutMaxSpeed:MaxSpeedendl; coutweight:weightendl; coutThe height is:Heightendl; coutThe number of seat is:SeatNumendl; } void Stop () { coutmotorcycle已经停啦！！！endl; } }; int main() { vehicle a(108,53); bicycle b(180,50,2); motorcar c(180,80,5); motorcycle d(120,90,1.2,3); vehicle *p[4]={a,b,c,d }; for(int i=0;i4;i++) { p[i]-Stop(); p[i]-Run(); } return 0; } 定义抽象基类Shape，由它派生出3个派生类：Circle，Square，Rectangle，Triangle，Trapezoid（梯形）