exam2.cpp

C++语言程序设计题典

#include <iostream.h>
class base
{
public:
	base() {fc(); }
	virtual void fc() { cout << "In class base" << endl; }
	virtual ~base()=0 { cout << "Destructing base object" << endl; }
};
class A:public base
{
public:
	A() { fc(); }
	void f() { fc(); }
	~A() { fd(); }
	void fd() { cout << "Destructing A object" << endl; }
};
class B:public A
{
public:
	B() {}
	void fc() { cout << "In class B" << endl; }
	~B() { fd(); }
	void fd() { cout << "Destructing B object" << endl; }
};
void main()
{
	B b;
	b.fc();
	base *p=new A;
	delete p;
}