c++

[Chad Leigh -- Shire.Net LLC]

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

> On Thu, 17 Feb 2005 13:17:51 +0100, Hubert Sokołowski
> <h.sokolowski at wsisiz.edu.pl> wrote:
>> On Thu, 17 Feb 2005 13:05:43 +0100
>> Gert Cuykens <gert.cuykens at 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 
compiler when matching parameter types at compiler time.

Chad