#include <iostream>
using namespace std;
//基类
class D
{
public:
D(){cout<<"D()"<<endl;}
~D(){cout<<"~D()"<<endl;}
protected:
int d;
};
class B:virtual public D
{
public:
B(){cout<<"B()"<<endl;}
~B(){cout<<"~B()"<<endl;}
protected:
int b;
};
class A:virtual public D
{
public:
A(){cout<<"A()"<<endl;}
~A(){cout<<"~A()"<<endl;}
protected:
int a;
};
class C:public B, public A
{
public:
C(){cout<<"C()"<<endl;}
~C(){cout<<"~C()"<<endl;}
protected:
int c;
};
int main()
{
cout << "Hello World!" << endl;
C c; //D, B, A ,C
cout<<sizeof(c)<<endl;
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