From: _ <jaarts AT geocities DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Newbie for loop/data type problem
Date: Sat, 28 Jun 1997 19:11:32 +0200
Organization: Lyrical kung-fu
Message-ID: <33B545C4.1503@geocities.com>
References: <33B4CBA2 DOT 40D6 AT lausd DOT k12 DOT ca DOT us>
Reply-To: jaarts AT geocities DOT com
NNTP-Posting-Host: 145.220.196.37
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 31
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

csantill wrote:
> 
> from: csantill AT lausd DOT k12 DOT ca DOT us
> 
> I'm having a problem w/a stupid for loop(or maybe I have newbie luck & I
> just found a bug in GCC v2.72).  Ok, I know chars are byte values, but
> they seemed to be signed in DJGPP (ANSI C dictates that they are
> unsigned; but then again, DJGPP isn't ANSI C or ANSI anything else for
> that matter).  When I change the RHIDE flag option so that GCC compiles
> chars as unsigned bytes I lose a *warning* about something like "data
> type limitation".  But, w/the unsigned char flag on, I get an infinite
> loop(this pisses me off because I call this function from another
> function).  If anybody has a work around (while loop, a mix of C wrapped
> in an inline ASM loop) or any other help would be great;
> 
> Here's a vague description of my code:
> 
> void stupid_error(char get_some_stupid_vars)
> {
> 
>   char c;
> 
>   for(c=0;c<=255;c++)
>   {
>     /* do some stupid newbie stuff */
>   }
> 
> }

Char c can never become bigger then 255 (because it's a byte) so c will
always be <= 255. You should use an int instead of a char.