menute.cpp

一个用c++实现的汉诺塔问题的游戏小程序.可作为课程设计的练习

/*    name menute.cpp
pop-up menu routines for text mode operation that use dos video service.
int menu(char *menu[],int x,int y)
the menu must end with '&' and you can use some character for some functions
"&-<cnn
 01234567890
 &:end     -:push any key  <:can use left and right key
 cnn:nn is the high color
*/
#include "iostream.h"
#include"stdlib.h"
#include"string.h"
#include "readkey.cpp"
#include "locate.cpp"

#define LT (char)218
#define TD (char)194
#define RT (char)191
#define LR (char)195
#define CC (char)197
#define RL (char)180
#define LD (char)192
#define DT (char)193
#define RD (char)217
#define SH (char)179
#define HE (char)196

#define esc 27
#define highlight 0x70
#define norm_vid 7



void save_video(int startx,int starty,int endx,int endy,unsigned int *buf_ptr);
void restore_video(int startx,int stary,int endx,int endy,unsigned int *buf_ptr);
void write_video(int x,int y,char *p,int attrib);
void display_menu(char *menu[],int x,int y,int count);
void draw_border(int startx,int starty,int endx,int endy);
int get_resp(int x,int y,int count0,int count,char *menu[],int len,int color);
int readscream(int ,int);
int read(int x,int y,int len,int color);
/*Display a pop-up menu and return selection.
 This function returns -2 if menu can't be constructed;
 it return -1 if use hits escape key;
 ortherwise the item number is returned starting with 0
 as then first (topmost)entry.*/
class WINDOW
	{
	private:
		unsigned int *_p;
		int _x,_y,_endx,_endy;
		void destroy();
	public:
		WINDOW();
		~WINDOW();
		int set(int,int,int,int);
	};
WINDOW::WINDOW()
	{
	_p=0;
	}
WINDOW::~WINDOW(){destroy();}
void WINDOW::destroy()
	{
	restore_video(_x,_y,_endx,_endy,_p);
	delete []_p;
	_p=0;
	}
int WINDOW::set(int x,int y,int endx,int endy)
	{
	if(x<1||y<1)return-2;
	if(endy>23||endx>75)return -2;
	/*allocate enough memory to hold the current contents of screen*/
	x--;y--;
	_p=new unsigned int[(endx-x+1)*(endy-y+1)];
	if(!_p)return-1; //return for not enough memery
	/*save what is currently onthe screen*/
	save_video(x,y,endx,endy,_p);
	draw_border(x,y,endx,endy);
	_x=x;
	_y=y;
	_endx=endx;
	_endy=endy;
	return 0;
	}
int menu(char *menu[],int x,int y)
	{
	WINDOW window;
	int i,len,color=-1;
	int endx,endy,count,count0=0;
	if(y>23||y<1||x>74||x<1)
		{
		cout<<"range errop";
		return -2;
		}
	/*make sure that the menu will fit*/
	for(i=0,len=0;;i++)
		{
		if(menu[i][0]=='-')count0=i+1;
		if(menu[i][0]=='&')break;
		if(strlen(menu[i])>len)len=strlen(menu[i]);
		}
	count=i;
	if(menu[i][3]>='c')color=(menu[i][4]-'0')*10+menu[i][5]-'0';
	if(color<0)color=highlight;
	endx=x+len;
	endy=y+count;
	window.set(x,y,endx+1,endy);
	/*display the menu*/
	display_menu(menu,x,y,count);
	return get_resp(x,y+count0,count0,count,menu,len,color);
	}
/*
void main()
	{
	char *p[]={ "qwerwegqgqwrt",
				"--------------",
				"qregqegrqer",
				"rgqerqqrgqwerq","& <   "};
	int i;
	for(i=0;i<=25;i++)
		cout<<"abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz"<<endl;
	for(i=168;i<230;i++)cout<<(char)i<<" "<<i<<";";
	menu(p,12,2);
	}
*/
/*display the menu in its priper location.*/
void display_menu(char *menu[],int x,int y,int count)
	{
	int i;
	for(i=0;i<count;i++,y++)
		{
		locate(x,y);
		cout<<menu[i];
		}
	}
/*draw borde*/
void draw_border(int startx,int starty,int endx,int endy)
	{
	register int i;
	/*draw line*/
	for(i=starty;i<endy;i++)
		{
		locate(startx,i);
		cout<<SH;
		locate(endx,i);
		cout<<SH;
		}
	/*draw h-line*/
	for(i=startx;i<endx;i++)
		{
		locate(i,starty);
		cout<<HE;
		locate(i,endy);
		cout<<HE;
		}
	/*draw corners*/
	locate(startx,starty);cout<<LT;
	locate(startx,endy);cout<<LD;
	locate(endx,starty);cout<<RT;
	locate(endx,endy);cout<<RD;
	}
/*input*/
int get_resp(int x,int y,int count0,int count,char *menu[],int len,int color)
	{
	union inkey{char ch[2];int i;}c;
	int arrow_choice=0;
	if(menu[count][1]=='-'){locate(0,0);c.i=readkey(0);return c.ch[1];}
	/*higlight the first selection*/
	for(;;)
		{
		c.i=read(x,y+arrow_choice,len,color);
		/*reset the selection to normal video*/
		if(c.ch[0])
			{
			/*check enter or space bar*/
			switch(c.ch[0])
				{
				case '\r':return arrow_choice;
				case ' ':arrow_choice++;
					break;
				case esc:return -1;
				}
			}
		else{/*is special key*/
			switch(c.ch[1])
				{
				case 72:arrow_choice--;break;
				case 80:arrow_choice++;break;
				}
			if(menu[count][2]=='<')
				if(c.ch[1]==75||c.ch[1]==77)return c.ch[1];
			};
		if(arrow_choice==(count-count0))arrow_choice=0;
		if(arrow_choice<0)arrow_choice=count-count0-1;
		}
	}
/*display a string with specified attribute*/
void write_video(int x,int y,char *p,int attrib)
	{
	union REGS r;
	int i;
	for(i=x;*p;i++)
		{
		locate(i,y);
		r.h.ah=9;
		r.h.bh=0;
		r.x.cx=1;
		r.h.al=*p++;
		r.h.bl=attrib;
		int86(0x10,&r,&r);
		}
	}

/*save screem*/
unsigned int *saveline(int startx,int y,int endx,unsigned int* buf_ptr)
	{
	union REGS r;
	int i;
	for(i=startx;i<=endx;i++)
		{
		locate(i,y);
		r.h.ah=8;
		r.h.bh=0;
		*buf_ptr++=int86(0x10,&r,&r);
		cout<<' ';
		}
	return buf_ptr;
	}
void save_video(int startx,int starty,int endx,int endy,unsigned int *buf_ptr)
	{
	int i,j;
	for(i=starty;i<=endy;i++)
		buf_ptr=saveline(startx,i,endx,buf_ptr);
	}
/*restore screem*/
unsigned int* restoreline(int startx,int y,int endx,
				unsigned int* buf,int attrib=-1)
	{
	union REGS r;
	unsigned char*p;
	int i;
	p=(unsigned char*)buf;
	for(i=startx;i<=endx;i++)
		{
		locate(i,y);
		r.h.ah=9;
		r.h.bh=0;
		r.x.cx=1;
		r.h.al=*p++;
		if(attrib==-1)r.h.bl=*p++;
		else
			{
			r.h.bl=attrib;
			p++;
			}
		int86(0x10,&r,&r);
		}
	return (unsigned int*)p;
	}
void restore_video(int startx,int starty,int endx,int endy,
							unsigned int *buf_ptr)
	{
	int i,j;
	for(i=starty;i<=endy;i++)
		buf_ptr=restoreline(startx,i,endx,buf_ptr);
	}
int readscream(int x,int y)
	{
	locate(x,y);
	asm{
		mov ah,8;
		mov bh,0;
		int 0x10;
		}
	return _AX;
	}
int read(int x,int y,int n,int c)
	{
	int i;
	unsigned int p[80];
	if(n>79)return -1;
	saveline(x,y,x+n,p);
	restoreline(x,y,x+n,p,c);
	locate(0,0);
	i=readkey(0);
	restoreline(x,y,x+n,p);
	return i;
	}