From:	Roman Suzi <nuser AT rsuzi DOT pgu DOT karelia DOT ru>
Newsgroups:	comp.os.msdos.djgpp
Subject:	[Q]: unsigned char
Date:	Thu, 23 Oct 97 19:36:47 +0300
Distribution:	su
Organization:	unknown
Message-ID:	<ABVqtJqOH3@rsuzi.pgu.karelia.ru>
Sender:	news-service AT sampo DOT karelia DOT ru
Reply-To:	nuser AT rsuzi DOT pgu DOT karelia DOT ru
Lines:	66
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Hi, all!

I have encountered a problem with porting a program
from BC++ 3.1 to gnu c++ (from DJGPP 2.01 package).

The problem is best seen in this example of code:
--------------------------------------------------
  unsigned char a;

  a = 253;

  if (a=='\xFD') {
   ...
  };
--------------------------------------------------

  Compiler gives warning, that
"comparison is always 0 due to limited range of data type"
(no matter with or without '-funsigned-char' flag)


There were nothing of the sort in BC.

When I use signed char a, the warning
disappears, but other things dont work properly
(e.g., xlat[b] ).

Is there any regular and efficient way to have unsigned chars
and comparisons with symbols above 127?

Are there any documents about porting
programs from BC/TC to DJGPP/gnu C++
beyond djgppfaq?

Thank you for answer.


Sincerely yours,
Roman




















--
 --               *                            --
--  Roman A. Suzi * Petrozavodsk Karelia Russia --
 --    http://www.angelfire.com/ks/sudensivu   --


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