From: Thomas Demmer <demmer AT LSTM DOT Ruhr-UNI-Bochum DOT De>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Why two identical typedef are considered an error in DJGPP?
Date: Tue, 28 Jan 1997 10:32:56 +0100
Organization: Lehrstuhl fuer Stroemungsmechanik
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To: djgpp AT delorie DOT com
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Moo-Juice wrote:
> 
> In article <32e22d1c DOT 4599867 AT ursa DOT smsu DOT edu>, Tony O'Bryan
> <aho450s AT nic DOT smsu DOT edu> writes
> >On Sat, 18 Jan 1997 01:01:22 GMT, Dave Pearson <davep AT hagbard DOT demon DOT co DOT uk>
> >wrote:
> >
> >>#ifndef BYTE
> >>typedef unsigned char BYTE;
> >>#endif
> >>
> >>#ifndef BYTE
> >>typedef unsigned char BYTE;
> >>#endif
> >
> >GCC complains about a redefinition, but will allow a #define in place of the
> >typedef.  Turbo C allows both versions.
> >
> >Sorry for the extra text, but Free Agent won't let me send a message that has
> >more quoted material than new. :(
> 
> One question...  why are the 'chars' unsigned?  This is a simple query
> and not an attack on the reason for using it :)
> 
> --
> Moo-Juice
 
char foo;
unsigned char bar;
int foobar;
  bar=foo=0xff;  /* foo is -1, bar is 255, but no problem here */
  foobar = bar,  /* foobar is 255, probably what you wanted    */
  foobar = foo;  /* foobar is -1, probably not what you wanted */



-- 
Ciao
Tom

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* Thomas Demmer                                             *
* Lehrstuhl fuer Stroemungsmechanik                         *
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