虚基类由最终派生类初始

#include <iostream.h>class A{int a;public:A(int x) {a=x;cout<<"Virtual Base A..."<<endl;}};class B:virtual public A{public:B(int i):A(i) {cout<<"Virtual Base B..."<<endl;}};class C:virtual public A{int x;public:C(int i):A(i){cout<<"Constructing C..."<<endl;}};class ABC:public C,public B{public:ABC(int i,int j,int k):C(i),B(j),A(i){cout<<"Constructing ABC..."<<endl;}};void main(){ABC obj(1,2,3);}