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NNTP-Posting-Date: Wed, 17 Aug 2011 23:41:55 -0500
Message-ID: <4E4C9814.53B@mindspring.com>
Date: Thu, 18 Aug 2011 00:41:56 -0400
From: pete <pfiland@mindspring.com>
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Subject: Re: selection-sort in C
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.c:9510

Jorgen Grahn wrote:
> 
> On Tue, 2011-08-16, arnuld wrote:
> >> On Tue, 16 Aug 2011 14:24:45 +0300, Phil Carmody wrote:
> >
> >>> arnuld <sunrise@invalid.address> writes:

> >>> int findSmallest(char s[], const int idx_cur, const int len);
> >
> >> The consts on those parameters don't do much,
> >> but aren't actually wrong.
> >
> > Just to show that function is not supposed to change its arguments.
> 
> That makes sense in the /definition/ of the function, provided you
> want them to be const just like you might want any local variable to
> be const.
> 
> It does not make sense in the /declaration/.  The compiler will just
> go "of course you can't change the argument, stupid -- C uses call by
> value!"

Regardless of how arnuld phrased things,
the const qualifiers which are shown above, 
apply to the parameters.

Also, 
if the parameters are const qualified 
in the definition of a function, 
then they should also be const qualified in any prototype
of that function.

-- 
pete