Date: Fri, 18 Feb 2000 05:31:33 +0600 (LKT) From: Kalum Somaratna aka Grendel X-Sender: root AT darkstar DOT grendel DOT net To: Prashant TR cc: djgpp AT delorie DOT com Subject: Re: Global variables and structs? In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Reply-To: djgpp AT delorie DOT com Errors-To: dj-admin AT delorie DOT com X-Mailing-List: djgpp AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk On Thu, 17 Feb 2000, Prashant TR wrote: > On Thu, 17 Feb 2000, Kalum Somaratna aka Grendel wrote: > > > This is true but the calculated use of global variables can help to avoid > > passing many arguments to functions. So using global variables can help to > > simplify the code and also make it easier to understand. But IMHO this > > should be done if you are confident with C/C++. > > Doesn't help most of the times, but creates a nuisance instead. It's a bad > practice to do this. Things like this can be used only for a single > program, certainly not for a large project. BTW Global variables were used extensively in ID softwares games like Wolfenstein 3D. Consider you are writing a game and you have a global structure which contains info about the player. The player stucture will have to be acessed by a lot of functions and since it is global there is no need to pass it as a argument to every routine that needs to acesss it, thus simplifying matters/code a lot. So IMHO _calculated_ not _haphazard_ use of global variables should be done especially in large projects. > > > > Do it with structs. Then you can pass a pointer to the struct and to > > > the screen and be done with it. > > > > Or better still use a global struct. That way you won't have to pass > > anything at all and it will make writing the code easier. > > Don't think this is a good idea. What Damian has said would get you a > better program. If the array is too large, consider using malloc. > Please see my above message and consider whether a structure which contains info about the screen (dimensions, bpp etc) would be better of as a global variable or not. It should be easier when it is a global variable as you wont have to pass it to every func every time you wanted to acess it.. Grendel. Hi, I'm a signature virus. plz set me as your signature and help me spread :)