C++ - 虚继承(virtual inheritance)

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虚继承(virtual inheritance)

本文地址: http://blog.csdn.net/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.csdn.net/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!

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