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From:	Eric Sosman <esosman AT acm DOT org>
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Subject:	Re: ISO and ANSI C++ (or C) ??
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Date:	Wed, 26 Nov 2003 13:37:38 GMT
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Chris Mantoulidis wrote:
> 
> I've heard that both are standards of the language. But what's the
> difference? Why would we want 2 standards?

    In the case of C (I'm not familiar with the C++ situation), the
International Standard is the governing document.  ANSI, like other
national standards bodies, adopted the ISO Standard verbatim.

    The previous version of this Standard was adopted by ISO in
1990.  Except for section numbers and the omission of some supporting
(non-normative) text, it was identical to the ANSI Standard adopted
in the preceding year.

    Implementations conforming to the newer "C99" standard have been
slow to appear.  Most implementations now available are of the earlier
"C90" standard with C99 features superimposed; a transition is in
progress.

-- 
Eric Sosman
esosman AT acm DOT org

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