Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!rochester!rutgers!att!lzaz!hutch
From: hutch@lzaz.ATT.COM (R.HUTCHISON)
Newsgroups: comp.lang.c
Subject: Re: When it is amoral... (Re: When is a cast not a cast?)
Message-ID: <563@lzaz.ATT.COM>
Date: 5 May 89 13:00:56 GMT
References: <2765@buengc.BU.EDU>
Organization: AT&T ISL Lincroft NJ USA
Lines: 18

Re: addition of two pointers

How 'bout in a binary search to find the middle char in an array of
characters?

	midpoint_pointer = (start_pointer + end_pointer) / 2;

Yes, I realize that you can...

	midpoint_pointer = ((end_pointer - start_pointer) / 2) + start_pointer;

... but I think people were asking when you might ever want to add two
pointers and where it could possibly me meaningful.  After all, if the
two variables were not pointers and represented distances (in feet) 
and I wanted the midpoint, I might choose the first approach.

Bob Hutchison
lzaz!hutch