C++ 虚函数

class Base
{
public:
	void f1()
	{
	printf("Base::f1()\n");
	}
	virtual void f2()
	{
	printf("Base::f1()\n");
	}
};
class Drived:public Base
{
public :
	void f1()

	{
		printf("Drived::f1()\n");
	}

	void f2()
	{
		printf("Drived::f2()\n");
	}
};
 int main()
 {
 Base *b1=new Base();
 Base *b2=new Drived();
 Drived *d3=new Drived();
 b1->f1();
 b1->f2();
 b2->f1();
 b2->f2();
 d3->f1();
 d3->f2();
 
 delete b1;
 delete b2;
 delete d3;
 return 0;
 }