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From: bright@dataio.UUCP
Newsgroups: comp.lang.c
Subject: Re: Function prototypes versus open()
Message-ID: <1312@dataio.Data-IO.COM>
Date: Tue, 2-Jun-87 13:05:54 EDT
Article-I.D.: dataio.1312
Posted: Tue Jun  2 13:05:54 1987
Date-Received: Thu, 4-Jun-87 06:11:24 EDT
References: <18346@ucbvax.BERKELEY.EDU> <8042@utzoo.UUCP> <2210@hoptoad.uucp> <2619@ulysses.homer.nj.att.com> <931@wjvax.wjvax.UUCP>
Reply-To: bright@dataio.UUCP (Walter Bright)
Organization: Data I/O - FutureNet Corp., Redmond, WA
Lines: 15

In article <931@wjvax.wjvax.UUCP> brett@wjvax.UUCP (Brett Galloway) writes:
-How about functions called with function pointers?  I am not that familiar
-with the details of function prototyping in the standard, but will it be
-possible to invoke functions with variable arguments with function pointers?
-If not, that will be quite annoying (and will break an application that I
-have written (under UNIX C).

The secret is in the declaration:

int (*fp1)(int);	/* pointer to function with fixed # of arguments */

int (*fp1)(char *,...);	/* pointer to function with variable arguments that
			   returns an int	*/

int (*fp)();		/* obsolete	*/