From:	Kai Dietrich <toepferei DOT dietrich AT t-online DOT de>
Newsgroups:	comp.os.msdos.djgpp
Subject:	if(a==0xff) warning
Date:	Fri, 10 Aug 2001 21:40:07 +0200
Organization:	T-Online
Lines:	19
Message-ID:	<9l1dan$nq3$01$1@news.t-online.com>
Mime-Version:	1.0
X-Trace:	news.t-online.com 997472407 01 24387 L2uqSb9VSgHzy2 010810 19:40:07
X-Complaints-To:	abuse AT t-online DOT com
X-Sender:	320009961467-0001 AT t-dialin DOT net
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Hi!

What does that mean:

char a;

a=0xff;

if(a==0xff)foo();


C:\>gcc foo.cpp -o foo.exe
foo.cpp: In function `void main()':
foo.cpp:598: warning: comparison is always false due to limited range of
data
type

the line es exactly the line if(a==0xff)foo();  I don't understand why
gcc reports a warning.

- Raw text -