X-Authentication-Warning: delorie.com: mailnull set sender to djgpp-bounces using -f
From: "Emile Bosch" <emilebosch AT hotmail DOT com>
Newsgroups: comp.lang.c++,comp.os.msdos.djgpp
References: <vTkS7.469287$Jy2 DOT 33400140 AT news DOT quicknet DOT nl> <9vcma8$gjt$06$1 AT news DOT t-online DOT com>
Subject: Re: ** Pointer thingie's <= what's up with the double *?
Lines: 57
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000
Message-ID: <_4lS7.469306$Jy2.33404928@news.quicknet.nl>
Date: Fri, 14 Dec 2001 12:11:48 +0100
NNTP-Posting-Host: 213.73.195.146
X-Complaints-To: abuse AT quicknet DOT nl
X-Trace: news.quicknet.nl 1008328122 213.73.195.146 (Fri, 14 Dec 2001 12:08:42 MET)
NNTP-Posting-Date: Fri, 14 Dec 2001 12:08:42 MET
Organization: QuickNet
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

whoosh that was a FAST reply =) Thanks!! I think i understand it now, have
to bring it
to real life with an example though!

is this a good example of it?:

int c;
int *ptr;
int **fptr;

c  = 5;
ptr = &c;

fptr = &ptr;

?
warm regards,
Emile Bosch


"Jakob Bieling" <NOnetsurfSPAM AT gmx DOT net> wrote in message
news:9vcma8$gjt$06$1 AT news DOT t-online DOT com...
> "Emile Bosch" <emilebosch AT hotmail DOT com> schrieb im Newsbeitrag
> news:vTkS7.469287$Jy2 DOT 33400140 AT news DOT quicknet DOT nl...
>
> > void** ptr; //? Double **?
> >
> > I get the single * but what's up with the ** ??
> > just when i tought i got the pointer thingies, they invented this :D
lol.
>
> ** means pointer-to-pointer. So, ptr would point to a memory location that
> points to another memory location. You can also have three or four or more
of
> those:
>
> long*** ptr;
>
> Now you have a pointer to a pointer that in turn points to another
pointer.
> Usually, you don't use the *** and rarely use **.
>
> > So can someone help me with this?
> > Oh, and if thát's possible is it also possible to have anything like
> >
> > void *& or something?
>
> Yes. That's a reference to a pointer. You won't see something like long*&&
or
> something, though. But here too you may use stuff like long**&.
>
> hth
> jb
>
>