Path: utzoo!attcan!uunet!wuarchive!zaphod.mps.ohio-state.edu!ncar!noao!stsci!davids
From: davids@stsci.EDU (David Silberberg)
Newsgroups: comp.lang.c
Subject: Casting pointers
Keywords: cast
Message-ID: <1614@ghost.stsci.edu>
Date: 19 Jul 90 12:57:05 GMT
Organization: Space Telescope Science Institute, Baltimore, MD 21218
Lines: 21

Does anyone know if the following cast operation will perform correctly?

main()
{
	SOME_STRUCT_TYPE	*ptr;
	int			num_chars;

	...
	(char *)ptr += num_chars;
	...
}


If the last line above were replaced by

	 ptr = (char *)ptr + num_chars;

it would perform as desired.  Does casting work on an lvalue?

David Silberberg
(davids@stsci.edu)