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From: david@comp.lancs.ac.uk (David Coffield)
Newsgroups: net.lang.c
Subject: Proper use of "extern" ...
Message-ID: <223@comp.lancs.ac.uk>
Date: Thu, 5-Jun-86 13:53:04 EDT
Article-I.D.: comp.223
Posted: Thu Jun  5 13:53:04 1986
Date-Received: Sat, 7-Jun-86 13:51:19 EDT
Reply-To: david@comp.lancs.ac.uk (David Coffield)
Organization: Department of Computing at Lancaster University, UK.
Lines: 34


Right.
Suggestions, please, as to the correct use of "extern" in the
following scenario:

A file has two functions in it, "f" and "g", thus

	static void f()
	{
		g();
	}

	static void g()
	{
	}

f uses g and g is declared after f (I know we can put g before
f and the following is no longer applicable but ...).

At the top of this file do we put

a) static void g() 	or

b) extern void g()?	(extern static must be meaningless).

My understanding (this varies with the book you read) of "extern" is that
it means the object is declared "later in this file or in another file" in
which case I vote for (b). Is this right?
-- 
"the secret of success is compost"

uucp:   ...!mcvax!ukc!dcl-cs!david     post: Department of Computing
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