Message-ID: <39EBEBF3.2A5EDE06@eton.powernet.co.uk>
Date: Tue, 17 Oct 2000 07:04:35 +0100
From: Richard Heathfield <binary AT eton DOT powernet DOT co DOT uk>
Organization: Eton Computer Systems Ltd
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Newsgroups: alt.comp.lang.learn.c-c++,comp.os.msdos.djgpp,comp.programming
Subject: Re: Undertaking a programming journey
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Ben Pfaff wrote:
> 
> 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;
> }

And here's another "right" way, making the same assumption, but also
assuming you don't like forever loops:

int clearstream(FILE *stream)
{
  int eof_found = 0;
  int ch;
  while((ch=getc(stream)) != '\n' && ch != EOF)
  {
    continue;
  }
  if(ch == EOF)
  {
    eof_found = 1;
  }
  return eof_found;
}

This is not a superior technique to Ben's (in fact, it's the /same/
technique, but structured a little differently, and returning some
useful information on the way).


-- 
Richard Heathfield
"Usenet is a strange place." - Dennis M Ritchie, 29 July 1999.
C FAQ: http://www.eskimo.com/~scs/C-faq/top.html
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