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From: bliss@sp64.csrd.uiuc.edu (Brian Bliss)
Newsgroups: comp.lang.c
Subject: Re: A question on Function declaration
Keywords: pointer function integer
Message-ID: <1991Feb13.213725.27598@csrd.uiuc.edu>
Date: 13 Feb 91 21:37:25 GMT
References: <5806@agate.UUCP>
Sender: news@csrd.uiuc.edu (news)
Reply-To: bliss@sp64.csrd.uiuc.edu (Brian Bliss)
Organization: Center for Supercomputing Research and Development
Lines: 32


> I would like to  declare a function which returns a pointer to a function
>(that returns an integer).

 int (*f( ))();
         ^arg list goes here
          (arg list for returned func goes in trailing parens)


>I tried the following (among others):
>	((int *)()) func() ;


 it is never legal to put parenthesis
 around a type specifier, except when
 performing the cast operation.
 just remember that declaration look like
 the var's usage, so you have

 a function f:
 f();

 a function returning a pointer:
 * f();      or
 *(f());     "apply the function, then dereference the ptr"

 a function returning a pointer to a function

 (*f())();   or
 (*(f()))(); "apply the function, deref ptr, apply result"  

 bb