【C++】子类在重写虚函数时，会覆盖父类的函数

//子类在重写虚函数时，会覆盖父类的函数
#include <iostream>
using namespace std;
class B
{
public:
	B()
	{
		cout<<"Create B!"<<endl;
	}
public:
	virtual void fun()
	{
		cout<<"B::fun()"<<endl;
	}
	virtual void show()
	{
		cout<<"B::show()"<<endl;
	}
	void print()
	{
		cout<<"B::print()"<<endl;
	}
};

class D : public B
{
public:
	D()
	{
		cout<<"Create D!"<<endl;
	}
public:
	void fun()
	{
		cout<<"D::fun()"<<endl;
	}
	void show()
	{
		cout<<"D::show()"<<endl;
	}
	virtual void list()
	{
		cout<<"D::list()"<<endl;
	}
};

void main()
{
	D d;
	B *p=&d;
	p->fun();    
	p->show();
}
<img src="http://img.blog.csdn.net/20150512213921986?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZG91ZG91d2ExMjM0/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />