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
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To: djgpp AT delorie DOT com
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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.