C++ 多态示例

#include<iostream>
using namespace std;

class A
{
public:
	void f(){cout<<"class A"<<endl;}
};

class B
{
public:
	virtual void f(){cout<<"class B"<<endl;}
};

class C:public A, public B
{
public:
	virtual void f(){cout<<"class C"<<endl;}
};

int main()
{
	A a, *p1;
	B b, *p2;
	C c, *p3;
	p1 = &a;
	p1->f();
	p2 = &b;
	p2->f();
	p1 = &c;
	p1->f();
	p2 = &c;
	p2->f();
	p3 = (C*)&a;
	p3->f();
	cout<<"********"<<endl;
	p2 = &c;
	p2->f();
	return 0;
}