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From: garys@bunker.UUCP (Gary M. Samuelson)
Newsgroups: net.lang.c
Subject: Re: alignment on a VAX (structure member ordering)
Message-ID: <769@bunker.UUCP>
Date: Fri, 29-Mar-85 11:11:02 EST
Article-I.D.: bunker.769
Posted: Fri Mar 29 11:11:02 1985
Date-Received: Sun, 31-Mar-85 03:16:27 EST
References: <466@lll-crg.ARPA> <9339@brl-tgr.ARPA> <1159@reed.UUCP> <478@lll-crg.ARPA>
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> It appears to me that packed structures are even jumping the gun.
> Does the C language even define the order in which the elements of
> a structure are placed in memory? The chapter on structures in K&R
> only states that the structure is a grouping of data items and I
> failed to find any statements about ordering of the elements.  Am
> I mistaken about this?

Yes, you are mistaken.  In K&R, appendix A, sec 8.5, p. 196:

	Within a structure, the objects declared have addresses
	which increase as their declarations are read left-to-
	right.  Each non-field member of a structure begins on
	an addressing boundary appropriate to its type; therefore,
	there may be unnamed holes in a structure.

Gary Samuelson
ittvax!bunker!garys