Date: Wed, 06 Jul 2005 18:36:09 +0200 From: "Juan J." =?ISO-8859-1?Q?Mart=EDnez?= <reidrac@usebox.net> To: Matt <mhersant@comcast.net> Cc: freebsd-hackers@FreeBSD.ORG, misc@openbsd.org Subject: Re: C programming question Message-ID: <1120667769.8695.10.camel@localhost.localdomain> In-Reply-To: <42518AC9.5070208@comcast.net> References: <42518AC9.5070208@comcast.net>
next in thread | previous in thread | raw e-mail | index | archive | help
El lun, 04-04-2005 a las 11:43 -0700, Matt escribió:
> [...]
> Can someone break down these declarations (if that's what they are)? Is
> this a form of typecasting? Thanks for your help.
Those are declarations of pointers to functions.
/* real function */
void dumb(int a) { return a; }
...
/* here follows a declaration of func pointer */
int (*func_ptr)(int);
int a;
/* assign it */
func_ptr=dumb;
/* use it */
a=func_ptr(123);
Any good book about C should cover this. Look for OOP in C also, it's
frequent use pointers to functions + structs to add classes to C.
regards,
Juanjo
--
Desarrollo y sistemas: http://www.usebox.net/
Página Personal: http://www.usebox.net/jjm/
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1120667769.8695.10.camel>