#include<iostream>
using namespace std;
class A
{
public:
virtual void f()const{cout<<"A::F"<<endl; }
void show(){f();}
};
class B:public A
{
public:
virtual void f()const{cout<<"B::F"<<endl; }
};
int main()
{
A a,*pa;
B b;
pa=&b;
//pa->f();
pa->show();
a.show();
a=b;
a.show();//此处调用f()难道不通过虚表？a的虚表难道没被b的虚表所覆盖？
return 0;
}
A A::operator=(B& b)
{
*(int*)(this)=*(int*)(&b);
return *this;
}
