Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!elroy.jpl.nasa.gov!usc!srhqla!demott!kdq
From: kdq@demott.com (Kevin D. Quitt)
Newsgroups: comp.lang.c++
Subject: Pointer arithmetic
Keywords: char* vs void* pointer arithmitic
Message-ID: <1991Jan4.191051.3995@demott.com>
Date: 4 Jan 91 19:10:51 GMT
Reply-To: kdq@demott.COM (Kevin D. Quitt)
Organization: DeMott Electronics Co., Van Nuys CA
Lines: 14


    What about the subtraction of pointers to get a constant?  I discovered
that gcc does not allow:

	int = strchr( string, char ) - &string;

to determine the position of char within string.  Is there a (good) reason
for disallowing this?  BTW, Microsoft C *does* accept this.

-- 
 _
Kevin D. Quitt         demott!kdq   kdq@demott.com
DeMott Electronics Co. 14707 Keswick St.   Van Nuys, CA 91405-1266
VOICE (818) 988-4975   FAX (818) 997-1190  MODEM (818) 997-4496 PEP last