611a.cpp

来自「C++实训教程」· C++ 代码 · 共 72 行

/*
	611a.CPP
	了解继承关系
	CopyRight by Feng.  2004/7		2003/10   1997/10
*/
#include<iostream.h>
class B
{
	private:	 int b0;
	protected:   int b1;
	public:
		int b;
		B (int n){	b0=n;b1=n+1;b=n+2;}
		void Disp()
	   {cout << "  b0=" <<b0<<"  b1="<<b1<<"  b=" <<b<<endl;}
};

class E : private B
{
	protected:int e1;
	public:
		E (int x,int y):B(x)
		{ 	e1=y + b1 + b;}
};


class G : protected B
{
	protected:int g1;
	public:
		G (int x,int y):B(x+y)  {b=y; b1=y;g1=x;}
};

class EE : public E
{
	protected:int ee1;
	public:
		EE (int x,int y):E(x,y)
		{ 	ee1=y ;}
      void Show()
      { cout << "Sum=" << (ee1 + e1)<<endl;  }
      //can not access b1,b ,Disp();
};


class GG : public G
{
	protected:int gg1;
	public:
		GG (int x,int y):G(x,y)  {b=y; b1=y;g1=x;}
      void Show()
      { cout << "Sum=" << (gg1 + g1+b1+b)<<endl; Disp(); }
};


main(void)
{
	EE e(2,22);
   e.Show();
	//e.b = 1;  //cannot access
   //e.Disp(); //cannot access

   GG g(4,44);
   //g.Disp(); //cannot access

	return 0;
}
/*
Sum=51

*/