Newsgroups: comp.os.msdos.djgpp
Subject: Re: How to empty the keyboard buffer
From: richard AT stardate DOT bc DOT ca (Richard Sanders)
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Date: 7 Oct 1999 20:29:57 -0800
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

>
>Okay, the shortest test program is the following:
>
>#include <stdlib.h>
>#include <stdio.h>
>
>#include "allegro.h"
>
>int main()
>{
>  int c;
>
>  allegro_init();
>  install_timer();
>  do
>  {
>    c = getch();
>    rest(1000);
>    while (kbhit())
>      c = getch();
>  }
>  while (c != 27);
>}

I have always found it better to empty the keyboard buffer before attempting to 
get keystroke. This ensures that any key strokes captured were made when your 
program was looking for one, not some leftover stuff or someone just playing 
on the keyboard.  Something like this.

/* start empty the keyboard buffer */
while( kbhit())
  getch();
/* end empty the keyboard buffer */

/* start key capture */
do
{
  while(!kbhit()); /* loop until a key is pressed */
  c=getch();
}
while( c!=27 );  /* loop until the desired key is pressed */
/* end key capture */