Another silly question

[Pete Holsberg]

In article <607 at kl-cs.UUCP> pc at cs.keele.ac.uk (Phil Cornes) writes:
=From article <17812 at cup.portal.com>, by Tim_CDC_Roberts at cup.portal.com:
=> Ok, folks.  In regards to  "a[i] == *(a+i) == *(i+a) == i[a]", let me
=> refer to the oft-used example  2["hello"].
=> I agree that this works and is equivalent to "hello"[2].  I've seen it
=> in books and postings.  My simple question is why? 
=
=C does not really support arrays, and the square bracket operator ([]) is
=just syntactic sugar to make you think that it does! This works quite well
=until you see things like "hello"[2] == 2["hello"] which only look odd if
=you continue to think of them as arrays and not pointers.

Can you explain why compilers produce different code for "a[i]" and "*(a+i)"?
Thanks.
-- 
Pete Holsberg, Mercer County Community College, Trenton, NJ 08690