From owner-freebsd-questions@FreeBSD.ORG  Sat Feb 19 09:57:55 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 4D42116A4CE
	for <freebsd-questions@freebsd.org>;
	Sat, 19 Feb 2005 09:57:55 +0000 (GMT)
Received: from hobbiton.shire.net (hobbiton.shire.net [166.70.252.250])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 1B39C43D1D
	for <freebsd-questions@freebsd.org>;
	Sat, 19 Feb 2005 09:57:55 +0000 (GMT)	(envelope-from chad@shire.net)
Received: from [67.161.222.227] (helo=[192.168.99.68])
	by hobbiton.shire.net with esmtpsa (TLSv1:RC4-SHA:128)
	(Exim 4.43)
	id 1D2RN4-000385-I3; Sat, 19 Feb 2005 02:57:54 -0700
In-Reply-To: <ef60af09050219015116024f83@mail.gmail.com>
References: <ef60af09050219015116024f83@mail.gmail.com>
Mime-Version: 1.0 (Apple Message framework v619.2)
Message-Id: <5b8472dd5925a0b0b59f15cd9f8e15f3@shire.net>
From: Chad Leigh -- Shire.Net LLC <chad@shire.net>
Date: Sat, 19 Feb 2005 02:57:53 -0700
To: Gert Cuykens <gert.cuykens@gmail.com>
X-Mailer: Apple Mail (2.619.2)
X-SA-Exim-Connect-IP: 67.161.222.227
X-SA-Exim-Mail-From: chad@shire.net
Content-Type: text/plain; charset=EUC-KR; format=flowed
Content-Transfer-Encoding: quoted-printable
X-Spam-Checker-Version: SpamAssassin 3.0.0 (2004-09-13) on hobbiton.shire.net
X-Spam-Status: No, score=-0.1 required=5.0 tests=AWL,BAYES_50 
	autolearn=disabled version=3.0.0
X-Spam-Level: 
X-SA-Exim-Version: 4.1+cvs (built Mon, 23 Aug 2004 08:44:05 -0700)
X-SA-Exim-Scanned: Yes (on hobbiton.shire.net)
cc: freebsd-questions@freebsd.org
Subject: Re: c++
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>,
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sat, 19 Feb 2005 09:57:55 -0000


On Feb 19, 2005, at 2:51 AM, Gert Cuykens wrote:

> On Thu, 17 Feb 2005 13:17:51 +0100, Hubert Soko=A9=A9owski
> <h.sokolowski@wsisiz.edu.pl> wrote:
>> On Thu, 17 Feb 2005 13:05:43 +0100
>> Gert Cuykens <gert.cuykens@gmail.com> wrote:
>>
>>> static void callback( GtkWidget *widget, gpointer   data ){
>>>     g_print ("Hello again - %s was pressed\n", (gchar *) data);
>>> }
>>>
>>> why do they put () around gchar ?
>>> why can it not be gchar *data ?
>>
>> You should learn some more about programming in C before you start
>> writing GTK apps.
>>
>> hs
>
> Does anybody want to explain what the () thingies are around gchar * ?
>

It is a typecast -- coercing "data" to be of type (gchar *) to the=20
compiler when matching parameter types at compiler time.

Chad