From: Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Commande boiskey
Organization: Pin Eight Software  http://pineight.8m.com/
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NNTP-Posting-Date: Sun, 25 Jun 2000 16:05:48 GMT
Distribution: world
Date: Sun, 25 Jun 2000 16:05:48 GMT
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

On Sun, 25 Jun 2000 11:33:51 -0400, "Redouane Zrari"
<zrari AT hotmail DOT com> wrote:

>Hello everyone.
>
>In a small program, I try to make an object move by the left and right
>arrow keys.  I test them with bioskey().  The problem:  even after
>having released the cursor, the object continues to move in the
>direction of the first pressed key (even if I press the other way).  I
>had to understand that keypresses remain in the "keyboard buffer"
>but.....  What to make of this?
>
>I use the Djgpp compiler.
>
>Thanks in advance

I haven't used bioskey(), but you need to "get" the keypress after you
have found out that the key was pressed; this pulls it out of the
"keyboard buffer".

Before I found Allegro, I used kbhit() to see if the user pressed a
key, then getch() to get it, through this function I wrote:

int GetKey()
{
  int n;

  if(!kbhit())
    return 0;
  n = getch();
  if(n)
    return n;
  return getch() << 8;
}

It returns 0 for no keypress, the ASCII value of a standard key, or
the scancode (shifted left 8 bits) for an extended key.

-- 
Damian Yerrick
"I refuse to listen to those who refuse to listen to reason."
See the whole sig: http://www.rose-hulman.edu/~yerricde/sig.html

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