C++ - 虚继承(virtual inheritance)

虚继承(virtual inheritance)

本文地址: http://blog.youkuaiyun.com/caroline_wendy/article/details/18089215

虚继承主要是避免基类重复被继承, 包含多个相同基类, 导致歧义性, 使用虚基类(virtual base class)继承, 可以使派生对象只包含一份基类文件.

如果不使用虚继承, 则派生类需要提供一份自己的示例版本, 

参见: http://blog.youkuaiyun.com/caroline_wendy/article/details/18077235

代码:

/*  * cppprimer.cpp  *  *  Created on: 2014.1.10  *      Author: Spike  */  /*eclipse cdt, gcc 4.8.1*/  #include <iostream> #include <string>  class ZooAnimal { public: 	void zooprint (void) { std::cout << "Zoo Animal!" << std::endl; } };  class Raccoon : public virtual ZooAnimal { public: 	void raccprint (void) { std::cout << "Raccoon!" << std::endl; } };  class Bear : public virtual ZooAnimal { public: 	void bearprint (void) { std::cout << "Bear!" << std::endl; } };  class Panda : public Bear, public Raccoon { public: 	void pandprint (void) { std::cout << "Panda!" << std::endl; } };  void dance (Bear& B) { 	B.bearprint(); }  void rummage (Raccoon& R) { 	R.raccprint(); }  int main (void) { 	Panda P; 	P.zooprint(); 	dance(P); 	rummage(P); } 

输出:

Zoo Animal! Bear! Raccoon! 

转载于:https://blog.51cto.com/spikeking/1387943