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NNTP-Posting-Date: Mon, 20 Feb 2012 16:32:27 -0600
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Date: Mon, 20 Feb 2012 17:32:27 -0500
From: pete <pfiland@mindspring.com>
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Subject: Re: Arrays Vs Pointers
References: <jgs51h$hhm$1@speranza.aioe.org> <slrnjk1qug.1m5e.willem@toad.stack.nl> <lnfwe6efr8.fsf@nuthaus.mib.org>
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Keith Thompson wrote:
> 
> Willem <willem@toad.stack.nl> writes:
> > peter wrote:
> > ) I am currently exploring the world of pointers and have encounter some
> > ) inconsistent information regarding the best way to reference an
> > ) array: array[1]   OR    *(array +1).
> > )
> > ) One book says that you should not use the syntax array[1] because
> > ) of performance reason.
> >
> > That book is completely and utterly wrong.
> > In C, "array[index]" is *exactly the same* as "*(array + index)"
> > I would go so far as to call it syntactic sugar.
> > Hell, it's even commutative.  "array[index]" means the same as "index[array]" !
> [...]
> 
> Yes, but I doubt that that's what the book actually said. 

Teach Yourself C, 
by Herbert Schildt, copyright 1990,
Chapter 6.3, Use Pointers With Arrays, 
page 197:

    For somewhat complex reasons, 
    a C compiler will generally create faster executable code
    for an expression such as

    *(p+3)

    than it will for the comparable array index

    p[3]

-- 
pete