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From: jv@mhres.mh.nl (Johan Vromans)
Newsgroups: comp.lang.c
Subject: Re: sprintf value (was: goto's and switch statements -- mild proposal)
Message-ID: <1282@mhres.mh.nl>
Date: Sun, 6-Sep-87 06:18:20 EDT
Article-I.D.: mhres.1282
Posted: Sun Sep  6 06:18:20 1987
Date-Received: Sun, 6-Sep-87 20:59:43 EDT
References: <855@tjalk.cs.vu.nl> <2683@hoptoad.uucp> <916@haddock.ISC.COM> <732@spar.SPAR.SLB.COM> <8413@mimsy.UUCP>
Organization: Multihouse N.V., The Netherlands
Lines: 31

>>What about all my code where I do something like:
>>
>>	f = fopen(sprintf(buf, filename, seq_num++), ...);
>
>It has to become
>
>	(void) sprintf(buf, filename, seq_num++);
>	f = fopen(buf, ...);
>
>>This seems like a gratuitous change to me !
>

How about using the alternation operator (,) :

	f = fopen (((void) sprintf(buf, filename, seq_num++), buf), ...);

For clarity, I would use a define like

#define NEXTNAME(name,seq)	((void) sprintf(buf, name, seq++), buf)

--
I have lots of programs which use statements like

	used += sprintf (buf+used, ....)

One of us has to make changes....
--
-- 
Johan Vromans                              | jv@mh.nl via European backbone
Multihouse N.V., Gouda, the Netherlands    | uucp: ..{?????!}mcvax!mh.nl!jv
"It is better to light a candle than to curse the darkness"