prog2.cpp

C++语言程序设计题典

#include <iostream.h>
class B
{
	int b;
public:
	B() {}
	B(int i) { b=i; }
	virtual void func()
	{
		cout << "B::func() called" << endl;
	}
};
class D:public B
{
public:
	D() {}
	D(int i,int j):B(i) { d=j; }
private:
	int d;
	void func()
	{
		cout << "D::func() called" << endl;
	}
};
void gfunc(B *obj)
{
	obj->func();
}
void main()
{
	D *pd=new D;
	gfunc(pd);
}