C++面向对象技术完全剖析_源代码（继承，封装，多态，虚函数，纯虚函数，虚拟继承，多重继承，函数重载，指针……）

/* 题目：带有多对象成员的虚拟多继承 要求：1、虚函数 多态 多态表现为 基类 基类指针和继承间的关系 2、带有多对象成员。定义 3、体现继承 虚拟继承（要通过至少三层 父类父类子类） 虚函数 （3层 纵向关系） 水平方向上：体现出继承顺序 先虚拟继承 再普通继承（至少8个类） 通过实例化类 体现对象构造和析构的顺序 还要有函数重载 指针 指针悬挂 无参函数等问题 */ #include <iostream> using namespace std; #define Max 10 class Driver //驾驶员基类 { public: Driver() { cout<<"载入Driver类构造函数"<<endl; } Driver(char *name, char *ID) //函数重载：构造函数的重载 { strcpy(this->name, name); strcpy(DriveID, ID); cout<<"载入Driver类构造函数"<<endl; } void SetName(char *name) { strcpy(this->name, name); } char *GetName() { return name; } void SetDriveID(char *ID) { strcpy(DriveID, ID); } virtual void ShowMe() //虚函数，可被子类重载 { cout<<"你好！我的名字是"<<name<<", 我的驾驶证号是"<<DriveID<<endl; } virtual ~Driver() { cout<<"载入Driver基类析构函数"<<endl; } protected: char name[Max]; char DriveID[2*Max]; }; class MainDriver: public Driver //主驾驶员 { public: MainDriver(char *name, char *id):Driver(name, id) { cout<<"载入MainDriver类构造函数"<<endl; } virtual void ShowMe() //虚函数，可被子类重载 { cout<<"你好！我是主驾驶员，我的名字是"<<name<<", 我的驾驶证号是"<<DriveID<<endl; } virtual ~MainDriver() { cout<<"载入MainDriver基类析构函数"<<endl; } }; class AssociateDriver:public Driver //副驾驶员类 { public: AssociateDriver(char *name, char *id):Driver(name, id) { cout<<"载入AssociateDriver类构造函数"<<endl; } virtual void ShowMe() //虚函数，可被子类重载 { cout<<"你好！我是副驾驶员，我的名字是"<<name<<", 我的驾驶证号是"<<DriveID<<endl; } virtual ~AssociateDriver() { cout<<"载入AssociateDriver基类析构函数"<<endl; } }; ///////////////////////////////////////////////////////////////////////////////////////////// class Vehicle //车辆基类 { public: Vehicle(int weight = 0) { Vehicle::weight = weight; cout<<"载入Vehicle类构造函数"<<endl; } void SetWeight(int weight) { cout<<"重新设置重量"<<endl; Vehicle::weight = weight; } virtual void ShowMe() = 0; //纯虚函数，一定要被子类重写 virtual char *GetVehicle() = 0;//纯虚函数，一定要被子类重写 virtual ~Vehicle() { cout<<"载入Vehicle基类析构函数"<<endl; } protected: int weight; }; class Car:virtual public Vehicle//汽车，这里是虚拟继承 { public: Car(int weight=0,int aird=0):Vehicle(weight) { Car::aird = aird; cout<<"载入Car类构造函数"<<endl; } void ShowMe() { cout<<"我是汽车！"<<endl; } char *GetVehicle() { return "Car"; } virtual ~Car() { cout<<"载入Car派生类析构函数"<<endl; } protected: int aird; }; class Boat:virtual public Vehicle//船,这里是虚拟继承 { public: Boat(int weight=0,float tonnage=0):Vehicle(weight) { Boat::tonnage = tonnage; cout<<"载入Boat类构造函数"<<endl; } void ShowMe() { cout<<"我是船！"<<endl; } char *GetVehicle() { return "Boat"; } virtual ~Boat() { cout<<"载入Boat派生类析构函数"<<endl; } protected: float tonnage; }; class AmphibianCar:public Car,public Boat//水陆两用汽车,多重继承的体现 { public: AmphibianCar(int weight,int aird,float tonnage) :Vehicle(weight),Car(weight,aird),Boat(weight,tonnage) //多重继承要注意调用基类构造函数 { cout<<"载入AmphibianCar类构造函数"<<endl; } void ShowMe() { cout<<"我是水陆两用汽车！"<<endl; } char *GetVehicle() { return "AmphibianCar"; } void ShowMembers() { cout<<" 重量："<<weight<<"顿，"<<"空气排 量："<<aird<<"CC，"<<"排水量："<<tonnage<<" 顿"<<endl; } virtual ~AmphibianCar() { cout<<"载入Boat派生类析构函数"<<endl; } }; ///////////////////////////////////////////////////////////////////////////////////////////// class Drive //驾驶类 { public: Drive(Driver *d, Vehicle *v) { cout<<"载入Drive类构造函数"<<endl; driver = d; vehicle = v; } virtual ~Drive() { cout<<"载入Drive类析构函数"<<endl; delete driver; delete vehicle; } void DriveVehicle() { cout<<driver->GetName()<<"正在驾驶"<<vehicle->GetVehicle()<<endl; } private: Driver *driver; Vehicle *vehicle; }; int main() { Drive *d; Driver *driver = new MainDriver("影儿飘飘", "123456"); driver->ShowMe(); cout<<endl<<"--------------------------------------------------"<<endl; Boat *b = new Boat(5, 400); b->ShowMe(); cout<<endl<<"--------------------------------------------------"<<endl; d = new Drive(driver, b); d->DriveVehicle(); cout<<endl<<"--------------------------------------------------"<<endl; delete d; ////////////////////////////////////////////////////////// cout<<endl<<"--------------------------------------------------"<<endl; AmphibianCar *a = new AmphibianCar(4,200,1.35f); a->ShowMe(); a->ShowMembers(); a->SetWeight(3); a->ShowMembers(); cout<<endl<<"--------------------------------------------------"<<endl; driver = new AssociateDriver("杨旭东", "654321"); driver->ShowMe(); cout<<endl<<"--------------------------------------------------"<<endl; d = new Drive(driver, a); d->DriveVehicle(); cout<<endl<<"--------------------------------------------------"<<endl; delete d; system("pause"); return 0; }