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From: Martin <martin.dowie@btopenworld.com>
Newsgroups: comp.lang.ada
Subject: Re: Fun with C
Date: Mon, 25 Apr 2011 05:12:39 -0700 (PDT)
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Date: 2011-04-25T05:12:39-07:00
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On Apr 25, 12:00=A0pm, Georg Bauhaus <rm.dash-bauh...@futureapps.de>
wrote:
> On 4/25/11 1:06 PM, Paul Colin Gloster wrote:
>
> > It was suspected in John R. Anderson; and Robin Jeffries, "Novice LISP
> > Errors: Undetected Losses of Information from Working Memory",
> > "Human-Computer Interaction", Volume 1, 1985 that people can
> > successfully learn to overcome minor problems, but when they later are
> > trying to solve harder problems then they make simple mistakes which
> > they had already learnt to not make.
>
> The impact of typos and other glitches seems a most interesting criterion
> for error classification and how a language facilitates ease of checking.
>
> > Anyway, the C example explicitly involved =A0int =A0and =A0unsigned int=
 =A0and
> > there is no guarantee that =A0int =A0is =A0signed int =A0though it is w=
ith
> > many compilers.
>
> That int is signed is defined by the language C, I think.
> C99, =A7 6.2.5

Keep reading:

C99, =A76.7.2

"5. Each of the comma-separated sets designates the same type, except
that for bit-fields, it is implementation-defined whether the
specifier int designates the same type as signed int or the same type
as unsigned int."

Now, I can see at least 2 ways this could be read...the imp-def
appears to be imp-def! ;-)

-- Martin