149.c

C++游戏开发书籍的实例非常适合初学但又又想往游戏开发方面发展的人学习哦

#include <stdio.h>
#include <dos.h>
#include <stdlib.h>
#include <bios.h>
#include <conio.h>
#include <string.h>
#include <ctype.h>

#define BORDER  1
#define ESC 27
#define REV_VID 0x1e
#define NORM_VID 0x40

char *main_menu[] = 
{
	"F --- 文件管理",
	"D --- 磁盘管理",
	"H --- 打印服务",
	"X --- 退出菜单",
};

char* sub_menu1[] = 
{
	"S --- 文件显示",
	"P --- 文件打印",
	"C --- 文件拷贝",
	"D --- 文件删除",
	"X --- 返回上级",
};

char* sub_menu2[] = 
{
	"B --- BOOT区备份",
	"R --- BOOT区恢复",
	"X --- 返回上级",
};

char* sub_menu3[] =
{
	"O --- 打印图形",
	"F --- 打印文本",
	"X --- 返回上级",
};

void goto_xy(int x, int y) /*将光标移动到指定位置*/
{
	union REGS regs;
	regs.h.ah = 2;
	regs.h.dl = x;
	regs.h.dh = y;
	regs.h.bh = 0;
	int86( 0x10, &regs, &regs );
}

void save_video( int startx, int endx, int starty, int endy, unsigned int* buf_ptr )
/*将指定区域的视频模式存储到指定的内存中去*/
{
	union REGS r;
	register int i, j;
	for( i = starty; i < endy; i++)
		for( j = startx; j < endx; j++ )
		{
			goto_xy(j, i);
			r.h.ah = 8;
			r.h.bh = 0;
			*buf_ptr++ = int86( 0x10, &r, &r );
			putchar(' ');
		}
}

void chineseputs( int x, int y, char *p, int attrib ) /*在指定的位置显示中文字符*/
{
	union REGS r;
	while(*p)
	{
		r.h.ah = 2;
		r.h.dl = x++;
		r.h.dh = y;
		int86(0x10, &r, &r);
		r.h.ah = 9;
		r.h.bh = 0;
		r.x.cx = 1;
		r.h.al = *p++;
		r.h.bl = attrib;
		int86( 0x10, &r, &r );
		
	}
}

void disp_box( int x1, int y1, int x2, int y2, int attrib) /*显示边框*/
{
	unsigned char* boxchar[6] = {"┏","━","┓","┃","┗","┛"};
	register int i;
	for( i = x1; i <= x2; i++ )
	{
		chineseputs( i, y1, boxchar[1], attrib );
		chineseputs( i, y2, boxchar[1], attrib );
	}
	for( i = y1; i <= y2; i++ )
	{
		chineseputs( x1, i, boxchar[3], attrib );
		chineseputs( x2, i, boxchar[3], attrib );
	}
	chineseputs( x1, y1, boxchar[0], attrib );
	chineseputs( x2, y1, boxchar[2], attrib );
	chineseputs( x2, y2, boxchar[5], attrib );
	chineseputs( x1, y2, boxchar[4], attrib );
}

void display_menu( char* menu[], int x, int y, int count ) /*显示菜单项*/
{
	register int i;
	for( i = 0; i < count; i++, x++)
	{
		goto_xy( x, y );
		cprintf( menu[i]);
	}
}

int is_in( char* s, char c) /*返回字符串中热键的位置*/
{
	register int i;
	for( i = 0; *s; i++ )
		if( *s++ == c ) return i + 1;
	return 0;
}

int get_resp( int x, int y, int count, char* menu[], char* keys ) /*获得用户的响应*/
{
	union inkey
	{
		char ch[2];
		int i ;
	} c ;
	int arrow_choice = 0, key_choice;
	y++;
	goto_xy(x, y);
	chineseputs( y, x, menu[0], REV_VID);
	for(;;)
	{
		while(!bioskey(1));
		c.i = bioskey(0);
		goto_xy( x + arrow_choice, y);
		chineseputs( y, x+arrow_choice, menu[arrow_choice], NORM_VID );
		if( c.ch[0] )
		{
			key_choice = is_in( keys, tolower( c.ch[0] ));
			if( key_choice ) return key_choice - 1;
			switch( c.ch[0] )
			{
			case '\r': return arrow_choice;
			case ' ':  arrow_choice++;
				   break;
			case ESC : return -1;
			}
		}
		else
		{
			switch( c.ch[1] )
			{
			case 72: arrow_choice--;
				 break;
			case 80: arrow_choice++;
				 break;
			}
		}
		if( arrow_choice == count ) arrow_choice = 0;
		if( arrow_choice < 0 ) arrow_choice = count - 1;
		goto_xy( x + arrow_choice, y );
		chineseputs( y, x+arrow_choice, menu[ arrow_choice ], REV_VID );
	}
}

void restore_video( int startx, int endx, int starty, int endy, unsigned char* buf_ptr )
/*恢复原有的视频方式*/
{
	union REGS r;
	register int i, j;
	for( j = startx; j < endx; j++)
		for( j = starty; j < endy; j++ )
		{
			goto_xy(i, j);
			r.h.ah = 9;
			r.h.bh = 0;
			r.x.cx = 1;
			r.h.al = *buf_ptr++;
			r.h.bl = *buf_ptr++;
			int86( 0x10, &r, &r );
		}
}

int popup( char* menu[], char* keys, int count, int x, int y, int border )
/*弹出式菜单的显示*/
{
	register int i, len;
	int endx, endy, choice;
	unsigned int *p;
	if((x>24)||(x<0)||(y>79)||(y<0))
	{
		printf("范围错");
		return -2;
	}
	len = 0;
	for( i = 0; i < count; i++ )
		if( strlen( menu[i]) > len ) len = strlen( menu[i] );
	endy = len + 2 + y;
	endx = count + 1 + x;
	if((endx+1>24)||(endy+1>79))
	{
		printf("菜单不匹配");
		return -2;
	}
	p = (unsigned int *) malloc((endx-x+1)*(endy-y+1));
	if( !p ) exit(1);
	save_video( x, endx + 1, y, endy+1, p );
	if( border ) disp_box( y, x, endy, endx, YELLOW );
	display_menu( menu, x + 1, y + 1, count );
	choice = get_resp( x + 1, y, count, menu, keys );
	restore_video( x, endx + 1, y, endy + 2, (unsigned char* ) p);
	free( p );
	return choice;
}

void main()
{
	int i, j;
	directvideo = 0;
	for(;;)
	{
		clrscr();
		goto_xy(0, 0);
		textcolor( BLACK  );
		textbackground( RED );
		switch( popup( main_menu, "fdhx", 4,5, 16, BORDER ))
		{
		case 0:
			clrscr();
			switch( popup( sub_menu1, "spcdx", 5, 5, 16, BORDER ))
			{
			case 0:
				clrscr();
				goto_xy( 24, 20 );
				cprintf("你选择了文件显示功能");
				getch();
				break;
			case 1:
				clrscr();
				goto_xy( 24, 20 );
				cprintf("你选择了文件打印功能");
				getch();
				break;
			case 2:
				clrscr();
				goto_xy( 24, 20 );
				cprintf("你选择了文件拷贝功能");
				getch();
				break;
			case 3:
				clrscr();
				goto_xy(24,20);
				cprintf("你选择了文件删除功能");
				getch();
				break;
			case 4:
				break;
			default:
				break;
			}
			break;
		case 1:
			clrscr();
			switch( popup( sub_menu2, "brx", 3, 5, 16, BORDER ))
			{
			case 0:
				clrscr();
				goto_xy(24,20);
				cprintf("你选择了BOOT区备份功能");
				getch();
				break;
			case 1:
				clrscr();
				goto_xy(24,20);
				cprintf("你选择了BOOT区恢复功能");
				getch();
				break;
			case 2:
				break;
			default:
				break;
			}
			break;
		case 2:
			clrscr();
			switch( popup( sub_menu3, "of", 3, 5, 16, BORDER ))
			{
			case 0:
				clrscr();
				goto_xy( 24, 20 );
				cprintf("你选择了打印图形功能");
				getch();
				break;
			case 1:
				clrscr();
				goto_xy(24,20);
				cprintf("你选择了打印文本功能");
				getch();
				break;
			case 2:
				break;
			default:
				break;
			}
			break;
		case 3:
		case -1:
			return 0;
		default:
			break;
		}
	}
}