Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!ucsd!rutgers!bellcore!clyde!ima!haddock!karl
From: karl@haddock.ima.isc.com (Karl Heuer)
Newsgroups: comp.lang.c
Subject: Re: Mutually recursive functions in C
Message-ID: <11750@haddock.ima.isc.com>
Date: 13 Feb 89 19:58:44 GMT
References: <34823@tut.cis.ohio-state.edu> <447@thirdi.UUCP>
Reply-To: karl@haddock.ima.isc.com (Karl Heuer)
Distribution: usa
Organization: Interactive Systems, Boston
Lines: 19

In article <447@thirdi.UUCP> peter@thirdi.UUCP (Peter Rowell) writes:
>william@cis.ohio-state.edu (James H. Williamson) writes:
>>Does C allow mutually recursive functions...
>
>[Yes.]  If the routines return anything other than "int" (or if you are using
>ANSI C with prototypes), you will need to place an extern declaration in the
>front of the file so that the compiler doesn't bitch about "Redeclaration of
>procedure Foo"...

Or, if the routines are intended to be local, then you should forward-declare
them using `static' (and hope your compiler isn't one of the broken ones that
can't handle this):
	static ftype_t f();
	static gtype_t g();
	...
	static ftype_t f() { ... g(); ... }
	static gtype_t g() { ... f(); ... }

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