c语言课程设计_鼠标器

/*为了让本实例尽可能简洁的突出鼠标编程，而不在其他方面过多分散读者的注意力。我忽略了很多实现的细节，读者对于可以在十进制编辑框中输入字符"F"之类的问题不要太吃惊。有兴趣的读者可以很容易的修正这个"bug"*/
#include<dos.h>
#include<conio.h>
#include<string.h>
#include<math.h>
#include<stdlib.h>
#include<stdio.h>
#define HEX 0
#define DEC 1
#define OCT 2
#define BIN 3

int index=0,choice=0;
/*初始化鼠标器*/
void initmouse()
{
 _AX=0;
 geninterrupt(0x33);

}
/*显示鼠标光标*/
void showmouse()
{
 _AX=1;
 geninterrupt(0x33);
}
/*隐藏鼠标*/
void hidemouse()
{
 _AX=2;
 geninterrupt(0x33);
}
/*取鼠标状态和鼠标位置*/
void getmouse(int *button,int *x,int *y)
{
 _AX=3;
 _BX=0;
 geninterrupt(0x33);
 *button=_BL;
 *x=_CX;
 *y=_DX;
}
/*设置程序中的数字字符表*/
int getnum(char c)
{
 int j;
 char alpha_set[36]="0123456789abcdefghijklmnopqrstuvwzyz";
 for(j=0;j<36;j++)
 {
  if(alpha_set[j]==c)
   break;
 }
 return j;
}
/*把任意radix进制的数，转换为十进制数*/
unsigned long convert_to_decimal(char *_num,int radix)
{
 int i,len;
 unsigned long dec=0;
 len=strlen(_num);
 len--;
 for(i=0;_num[i]!=NULL;i++,len--)
 {
  dec+=(getnum(_num[i])*pow(radix,len));
 }
 return dec;
}
/*在给定的坐标(x,y)的位置显示一个字符串*/
void display(int x,int y,char string[80])
{ gotoxy(x,y);
 cprintf(string);
}
/*清屏，并且把背景色设置为青绿色*/
void make_screen_cyan()
{
 textbackground(CYAN);
 clrscr();
}
/*绘制程序的初始界面*/
void start_screen()
{
 index=0;
 hidemouse();
 make_screen_cyan();
 textbackground(RED);
 textcolor(BLACK);
 display(20,1,"Radix Converter by NILOY MONDAL.");
 display(10,2,"Email:-yiwei@zju.edu.cn");
 display(30,3,"Press Escape to Quit");
 textbackground(CYAN);
 display(10,5,"Hexadecimal:- ");
 display(10,7,"Decimal    :- ");
 display(10,9,"Octal      :- ");
 display(10,11,"Binary     :- ");
 textbackground(BLUE);
 display(23,5,"                                                      ");
 display(23,7,"                                                      ");
 display(23,9,"                                                      ");
 display(23,11,"                                                      ");
 if(choice==HEX)
  gotoxy(24,5);
 else if(choice==DEC)
  gotoxy(24,7);
 else if(choice==OCT)
  gotoxy(24,9);
 else if(choice==BIN)
 &nb