tc中找不到display.h怎么办？？？？

#include"stdio.h"
#include"stdlib.h "
#include"graphics.h"
#define ESC 0x1b
void Initialize(void)
{int GraphDriver;
int GraphMode;
int ErrorCode;
GraphDriver =DETECT;
initgraph (&GraphDriver,&GraphMode,"");
ErrorCode = graphresult ();
if (ErrorCode !=grOk)
{printf("Graphics System Error;%s\n",grapherrormsg(ErrorCode));
exit(1);
}
}
#include<math.h>
#include"display.h"
main()
{int xo,yo,xa,ya,x,y;
int dx,dy,c,f;
Initialize();
printf("input x,y");
scanf("&d,%d",&xo,&yo);
printf("xa:%d-639",xo); scanf("%d",&xa);
printf("ya:0..%d",yo); scanf("%d",&ya);
if (xa>=xo && xa<=639 && ya>=0 && ya<=yo)
{outtextxy (xo,yo+5,"o");
outtextxy (xa,ya-0,"a");
dx=xa-xo; dy=yo-ya;
if (dx>dy) c=dx;
else c=dy;
x=xo; y=yo; f=0.0;
while (c>=0)
{putpixel(x,y,14);
if (f>0) {x=x+1; f=f-dy; if (dx>dy) c=c-1;}
else {y=y-1; f=f+dx; if(dx<=dy) c=c-1;}
}
}
else
printf("error");
}

放弃