C++ - 虚继承(virtual inheritance)的构造(construct)和析构(destruct)顺序

虚继承(virtual inheritance)的构造(construct)和析构(destruct)顺序

 

在多重继承的时候, 构造顺序是 虚继承按顺序优先, 再次是其他按顺序, 由基类至派生类; 析构顺序正好相反;

 

代码如下:

/*   * cppprimer.cpp   *   *  Created on: 2014.1.10   *      Author: Spike   */    /*eclipse cdt, gcc 4.8.1*/    #include <iostream>  #include <string>    class ZooAnimal {  public:  	ZooAnimal () {  		std::cout << "ZooAnimal Constructor!" << std::endl;  	}  	void zooprint (void) { std::cout << "Zoo Animal!" << std::endl; }  };    class Bear : public virtual  ZooAnimal {  public:  	Bear (){  		std::cout << "Bear Constructor!" << std::endl;  	}  	void bearprint (void) { std::cout << "Bear!" << std::endl; }  };    class Character {  public:  	Character () {  		std::cout << "Character Constructor!" << std::endl;  	}  };    class BookCharacter : public Character {  public:  	BookCharacter () {  		std::cout << "BookCharacter Constructor!" << std::endl;  	}  };    class ToyAnimal {  public:  	ToyAnimal () {  		std::cout << "ToyAnimal Constructor!" << std::endl;  	}  };    class TeddyBear : public BookCharacter, public Bear,  								public virtual ToyAnimal  {  public:  	TeddyBear () {  		std::cout << "TeddyBear Constructor!" << std::endl;  	}  };    int main (void)  {  	TeddyBear TB;  }  

输出:

ZooAnimal Constructor!  ToyAnimal Constructor!  Character Constructor!  BookCharacter Constructor!  Bear Constructor!  TeddyBear Constructor!