虚继承

#include<iostream>using namespace std;class GrandFather{public:void show(){cout<<"GrandFather show"<<endl;return;}};class Father:virtual public GrandFather{};class Mother:virtual public GrandFather{};class Son:public Father,public Mother{};int main(int argc,char**argv){Son s;s.show();return 0;}

//虚继承才有了虚基类，以防止二义性的出现