Date: Mon, 16 Oct 2000 23:52:33 +0200
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
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To: djgpp AT delorie DOT com
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In-reply-to: <87og0k5w18.fsf@pfaffben.user.msu.edu> (message from Ben Pfaff on
	16 Oct 2000 17:13:55 -0400)
Subject: Re: Undertaking a programming journey
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> From: Ben Pfaff <pfaffben AT msu DOT edu>
> Newsgroups: alt.comp.lang.learn.c-c++,comp.os.msdos.djgpp,comp.programming
> Date: 16 Oct 2000 17:13:55 -0400
> 
> Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p> writes:
> 
> > For the record, what's the "right" way to clear an input buffer?
> 
> Here's one "right" way, assuming that you mean "skip input up to
> the end of the line":
> 
> for (;;) {
>   int c = getc (stream);
>   if (c == '\n' || c == EOF)
>     break;
> }

IMHO, this is not a very good method: depending on system-dependent
buffering, this could become stuck inside the call to getc.

It is much better, in my experience, to simply fseek the stdin stream
to a sufficiently large negative offset.  All implementations I've
seen will throw away buffered characters in this case.

Termios has a special function tcflush to discard characters pending
on a given file handle.  This doesn't empty the characters buffered
inside a FILE object, though, but you could use tcflush in addition to
the fseek trick, to really empty everything.