frame_step03.txt

用什么语言能编制出好的程序

//*****************************************************
//		Step 3
//  Desc: 1) 部分实现子类的成员函数(Width()和Height())
//	  
//
//*****************************************************
#ifndef PICTURESH
#define PICTURESH

#include <iostream.h>
class Node;
//------------------------------------------------------
class Picture
{
public:
	Picture(char ** array,int wd, int ht);
	~Picture();
	Picture(const Picture& rhs);
	Picture& operator=(const Picture& rhs);
	void Display() const;
public:
	void Display() const;
	int  Width() const;
	int  Height() const;
private:
	Node *  pt;
};
//-------------------------------------------------------
class Node
{
public:
	Node();
	virtual ~Node()	{}
	virtual  void Display() const=0;
	virtual  int  Width()  const=0;
	virtual  int  Height() const=0;
};
//------------------------------------------------------
class DataPic:public Node
{
public:
	DataPic(char ** array,int wd, int ht);
	~DataPic()	{delete[] data;}
public:
	int		Width() const	{return w;}
	int		Height() const	{return h;}
private:
	DataPic(const DataPic& rhs);		//no define
	DataPic& operator=(const DataPic& rhs);	//no define
private:
	int		w;
	int		h;
	char *	data;
};
//------------------------------------------------------
class FramePic:public Node
{
public:
	FramePic(const Picture& rhs);
	~FramePic() {}
	int Width() const	{return kernel.Width()+2;}
	int Height() const	{return kernel.Height()+2;}
private:
	Picture	kernel;
};
//------------------------------------------------------
class HCatPic:public Node
{
public:
	HCatPic(const Picture& lpic,const Picture& rpic);
	~HCatPic() {}
	int Width() const;
	int Height() const;
private:
	Picture		left;
	Picture		right;
};
//------------------------------------------------------
class VCatPic:public Node
{
public:
	VCatPic(const Picture& tpic,const Picture& bpic);
	~VCatPic() {}
	int Width() const;
	int Height() const;
private:
	Picture		top;
	Picture		bottom;
};
#endif