C++中的虚继承(virtual inheritance)

 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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