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From: c9h@psuecl.bitnet
Newsgroups: comp.lang.c
Subject: Re: Pointer arithmetic and comparisons.
Message-ID: <70817@psuecl.bitnet>
Date: 8 Dec 89 01:36:25 GMT
References: <257ECDFD.CDD@marob.masa.com>
Organization: Engineering Computer Lab, Pennsylvania State University
Lines: 17

In article <257ECDFD.CDD@marob.masa.com>, daveh@marob.masa.com (Dave Hammond) writes:
> The problem occurs when the address resulting from &buffer[len] exceeds
> 65535.  For example, if &buffer[0] is 65535 and len is 100, &buffer[len]
> becomes 99, making `while (p < e)' immediately false.
>
> I was under the impression that (for n > 0) buffer[n] should not yield
> an address lower than buffer[0].  Is the pointer comparison I am doing
> non-portable, or otherwise ill-advised ?

This will *only* occur if you are accessing an element outside of the
array's boundaries.

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