《C语言程序设计实训》源代码

				/*5-2.c*/
				#include
				#include
				#include
				#include
				union REGS r;
				void mouse(int x,int y)
				{
				line(x-5,y,x+5,y);
				line(x,y-5,x,y+5);
				}
				void read(int *x,int *y,int *mbutt,int *oldx,int *oldy)
				{
				 *oldx=*x;
				 *oldy=*y;
				 do
				 {r.x.ax=3;
				  int86(51,&r,&r);       /*产生鼠标中断*/
				  *x=r.x.cx;             /*光标当前X坐标*/
				  *y=r.x.dx;              /*光标当前Y坐标*/
				  *mbutt=r.x.bx;         /*按键状态*/
					}while(*x==*oldx&&*y==*oldy&&*mbutt==0);
				}
				main()
				{
				char *strx,*stry;
				int mx,my,ox,oy;
				int butt;
				int gd=DETECT,gm;
				  initgraph(&gd,&gm,"c:\\bc\\bin\\bgi");
				setwritemode(XOR_PUT);
				 r.x.ax=3;
				 int86(51,&r,&r);
				 mx=r.x.dx;
				 my=r.x.cx;
				 butt=r.x.bx;
				 mouse(mx,my);
				 setfillstyle(1,BLACK);
				 for(;;)
				 {
				 bar(5,5,100,25);
				  sprintf(strx,"%d",mx);
					sprintf(stry,"%d",my);
				outtextxy(10,10,strx);
				outtextxy(60,10,stry);
				delay(20);
				  read(&mx,&my,&butt,&ox,&oy);
				  mouse(ox,oy);
				  mouse(mx,my);
				 if(butt==1)
				  exit(0);
				}
				}