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From: ron@topaz.rutgers.edu (Ron Natalie)
Newsgroups: comp.lang.c
Subject: Re: COMMA separated expresses
Message-ID: <12918@topaz.rutgers.edu>
Date: Thu, 25-Jun-87 11:59:52 EDT
Article-I.D.: topaz.12918
Posted: Thu Jun 25 11:59:52 1987
Date-Received: Sat, 27-Jun-87 01:33:42 EDT
References: <1601@oliveb.UUCP>
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 15

The syntax of comma operator is
	expr , expr

RETURN is a control keyword  not an expression.  You can't say things like

	x = return;

Exit is a function (it never returns, but C doesn't know that generally).
Functions are a simple form of expression, hence you can say

	x = exit(19)

or use it in either operand of a comman operator.

-Ron