Re: When does the type of a character constant make a difference?

From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: When does the type of a character constant make a difference?
Date	2015-10-24 13:05 -0700
Organization	None to speak of
Message-ID	<lnoafot4kf.fsf@kst-u.example.com> (permalink)
References	<n0g6oe$so9$1@solani.org> <n0gaov$ble$1@dont-email.me>

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Bartc <bc@freeuk.com> writes:
> On 24/10/2015 16:05, Philipp Klaus Krause wrote:
>> Character constants are of type int, not char in the standard (ignoring
>> wide character constants, which might be of other types, such as char).
>> But in which situations does this make a real difference? The only one I
>> can think of now is generic selections.
>
> I was doing a test but came across something funny (probably just 
> another quirk I wasn't aware of).
>
> Although 'A' has type int, it only apparently acquires type int after 
> converting from type char.
>
> Because if char is signed, then a value such as '£' (which is code 156 
> on my machine, a UK pound sign), has the value -100 even though '£' is 
> has type signed int which has enough range to represent it as 156.

What encoding are you using where the UK pound sign has code 156?  It's
163 in Unicode and Latin-1.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

Thread

When does the type of a character constant make a difference? Philipp Klaus Krause <pkk@spth.de> - 2015-10-24 17:05 +0200
  Re: When does the type of a character constant make a difference? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-24 16:55 +0100
  Re: When does the type of a character constant make a difference? raltbos@xs4all.nl (Richard Bos) - 2015-10-24 15:59 +0000
  Re: When does the type of a character constant make a difference? Bartc <bc@freeuk.com> - 2015-10-24 17:16 +0100
    Re: When does the type of a character constant make a difference? Richard Damon <Richard@Damon-Family.org> - 2015-10-24 12:41 -0400
    Re: When does the type of a character constant make a difference? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-24 17:50 +0100
    Re: When does the type of a character constant make a difference? Keith Thompson <kst-u@mib.org> - 2015-10-24 13:05 -0700
      Re: When does the type of a character constant make a difference? Bartc <bc@freeuk.com> - 2015-10-24 22:09 +0100
        Re: When does the type of a character constant make a difference? Nobody <nobody@nowhere.invalid> - 2015-10-26 06:15 +0000
          Re: When does the type of a character constant make a difference? raltbos@xs4all.nl (Richard Bos) - 2015-10-26 09:07 +0000

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