10.4.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:
	  void f1();
  protected:
	  int a1;
  private:
	  int a2;
};
class B:public A
{
  public:
	  void f2();
  protected:
	  void f3();
  private:
	  int b;
};
class C:protected B
{
  public:
	  void f4();
  protected:
	  int c1;
  private:
	  int c2;
};
class D:private C
{
  public:
	  void f5();
  protected:
	  int d1;
  private:
	  int d2;
};