11.12.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
class A
{
  public: 
	virtual ~A()
	{  cout<<"A::~A() called.\n";  }
};
class B:public A
{
  public:
	B(int i)
	{  buffer=new char[i];  }
	~B()
	{  
		delete [] buffer;
		cout<<"B::~B() called.\n";
	}
  private:
	char *buffer;
};
void fun(A *a)
{
	delete a;
}
void main()
{
	B *b=new B(5);
	fun(b);
}