From:	"John M. Aldrich" <fighteer AT cs DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Type casting problems with gcc
Date:	Sat, 01 Mar 1997 22:09:20 -0800
Organization:	Two pounds of chaos and a pinch of salt
Lines:	22
Message-ID:	<33191990.5073@cs.com>
References:	<5f9trv$e6t AT crl9 DOT crl DOT com>
Reply-To:	fighteer AT cs DOT com
NNTP-Posting-Host:	ppp206.cs.com
Mime-Version:	1.0
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Samuel McGrath wrote:
> 
> I'm using the Allegro graphics library right now, and I'm trying to
> reference the w and h fields of the BITMAP structure like this:
> 
> void* bmp = create_bitmap(320,200);
> int bitmapwidth = (BITMAP*)(bmp)->w;

Try:  int bitmapwidth = ((BITMAP *) bmp)->w;

I'm at a loss for why you can't just declare it the proper type to begin
with, though...  if you post the code that includes such a construct I'd
be glad to try to show you a better way to achieve what you're trying to
do.  :)


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