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From: wen-king@cit-vax.Caltech.Edu (King Su)
Newsgroups: comp.lang.c
Subject: powerful expressions
Message-ID: <12855@cit-vax.Caltech.Edu>
Date: 2 Dec 89 06:14:29 GMT
Organization: California Institute of Technology
Lines: 30

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While we are discussing styles, let's talk about simple expressions
that do a lot things.

	struct QUEUE { struct QUEUE *next;
		       <... other fields in the structure ...> } ;

	struct QUEUE *qhead, *qtail, *qnew;

I have concocted the following single expression that appends 'qnew' to
the queue formed by 'qhead' and 'qtail'.  The queue is null terminated,
'qhead' points to the first element of the queue, and 'qtail' points to
the last element of the queue:

	((qhead) ? (qtail = qtail->next = qnew)
		 : (qtail = qhead       = qnew))->next = 0;

Do you have any favorite C-expressions that you would like to share?

-- 
/*------------------------------------------------------------------------*\
| Wen-King Su  wen-king@vlsi.caltech.edu  Caltech Corp of Cosmic Engineers |
\*------------------------------------------------------------------------*/