Listing 1. Include Files

   #include <stdio.h>
   #include <math.h>
   ...


   #include <sys/movedata.h>
   #include <keys.h>
   #include <dos.h>
   #include <pc.h>


   #include <vga.h>
   #include <vgamouse.h>
   #include <vgakeyboard.h>