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From: Sepp@ppcger.ppc.sub.org (Josef Wolf)
Newsgroups: comp.lang.c
Subject: Re: 0xFF != '\xFF' ?
Message-ID: <H7Yd2E@ppcger.ppc.sub.org>
Date: 14 Apr 91 23:00:23 GMT
References: <28007837.35A9@marob.uucp> <wolfram.671457062@cip-s08>
Lines: 21

wolfram@cip-s08.informatik.rwth-aachen.de (Wolfram Roesler) writes:
] It's best to compare in the following way:
] 	char x = -1;
] 	char y = 0xff;
] 	if ((unsigned char)x = (unsigned char)y)
] 	  ...
] ... so before comparing, cast both to unsigned char. This because you
] do not know (because it's undefined by the language definition) if char
] is unsigned or not.

You even don't know about the number of bits of a char (or is it defined?)
So you can get into trouble with this.

Greetings
    Sepp

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