#include??“Conio.h“??
#include??“dos.h“??
#include??“graphics.h“??
#define??closegr??closegraph??
union??REGS??regs;??
int??X_maxY_max??;??
void??initgr（void）????????????????/*??BGI初始化??*/??
{??
?????int??gd??=??DETECT??gm??=??0;??
?????/*registerbgidriver（EGAVGA_driver）;??*/
?????initgraph（&gd??&gm??““）;??
?????X_max??=??getmaxx（）;????????????/*求橫、縱向象點(diǎn)坐標(biāo)數(shù)*/??
?????Y_max??=??getmaxy（）;??
}??

int??Msinit（int??Xloint??Xhiint??Yloint??Yhi）/*鼠標(biāo)初始化*/??
{??
?????int??retcode;??
?????regs.x.ax??=??0;??????????????????/*初始化鼠標(biāo)*/??
?????int86（0x33®s®s）;??
?????retcode??=??regs.x.ax;??
?????if（retcode??==??0）??return??0;??
?????regs.x.ax??=??7;??????????????????/*設(shè)置鼠標(biāo)X方向的移動(dòng)范圍*/??
?????regs.x.cx??=??Xlo;??
?????regs.x.dx??=??Xhi;??
?????int86（0x33®s®s）;??
?????regs.x.ax??=??8;??????????????????/*設(shè)置鼠標(biāo)Y方向的移動(dòng)范圍*/??
?????regs.x.cx??=??Ylo;??
?????regs.x.dx??=??Yhi;??
?????int86（0x33®s®s）;??
?????return??retcode;??
}??

int??Msread（int??*pxint??*pyint??*pbuttons）/*讀鼠標(biāo)位置及狀態(tài)*/??
{static??int??x0??=??320y0??=??240but0??=??0;??
int??xnewynewch;??
do??
{??
?????