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From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.lang.c
Subject: Re: varargs functions: calling and prototyping
Keywords: varargs, prototypes
Message-ID: <17157@haddock.ima.isc.com>
Date: 27 Jul 90 00:57:43 GMT
References: <1990Jul25.195944.9238@DRD.Com>
Reply-To: karl@kelp.ima.isc.com (Karl Heuer)
Organization: Interactive Systems, Cambridge, MA 02138-5302
Lines: 12

In article <1990Jul25.195944.9238@DRD.Com> mark@drd.Com (Mark Lawrence) writes:
>[A function defined with the <varargs.h> macros fails to match its prototype]

Don't use <varargs.h> in ANSI C.  Use <stdarg.h> instead.

>do I need to provide a terminating NULL when calling this function

Not in this case.  The function that ultimately parses the variadic part is
vsprintf, and it uses the format string, rather than a sentinel value, to
detect the end of the list.

Karl W. Z. Heuer (karl@kelp.ima.isc.com or ima!kelp!karl), The Walking Lint