Path: utzoo!attcan!uunet!tank!ncar!unmvax!deimos.cis.ksu.edu!rutgers!dptg!ulysses!andante!alice!ark
From: ark@alice.UUCP (Andrew Koenig)
Newsgroups: comp.lang.c
Subject: Re: What's a C expert?
Message-ID: <9822@alice.UUCP>
Date: 25 Aug 89 03:10:27 GMT
References: <12214@well.UUCP> <6057@microsoft.UUCP> <338@mead.UUCP>
Distribution: all
Organization: AT&T Bell Laboratories, Liberty Corner NJ
Lines: 28

In article <338@mead.UUCP>, dem@mead.UUCP (Dave Myers) writes:
-> 
-> In article <1336@atanasoff.cs.iastate.edu> hascall@atanasoff.cs.iastate.edu.UUCP (John Hascall) writes:
-> >In article <6057> paulc@microsoft.UUCP (Paul Canniff 2/1011) writes:
-> >}In article <12214@well.UUCP> tmh@well.UUCP (Todd M. Hoff) writes:
-> > 
-> >}>           What do you need to know to be an expert C programmer?
-> > 
-> >}How about ... understands why a[i] equals i[a] and CAN EXPLAIN IT,
-> >
-> >    a[i] = *(a+i), i[a] = *(i+a), a+i = i+a
-> >
-> 
-> 
->    Hmmm....  I don't claim to be a C expert, but let's take a trivial
-> case.

-> 	a[i] == *(a + (i * sizeof(int) * BIGNUMBER))
-> 	i[a] == *(i + (a * sizeof(int)))
-> 
->    Clearly, these are not equal.

You're right, you're not a C expert.  a[i] and i[a] truly are
identical.  I'll leave it to you to figure out which of your
two `equivalences' aren't.
-- 
				--Andrew Koenig
				  ark@europa.att.com