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From: rrw@ccice1.UUCP (Rick Wessman)
Newsgroups: net.lang.ada
Subject: Scope of variables in Ada.
Message-ID: <382@ccice1.UUCP>
Date: Sun, 2-Mar-86 15:03:08 EST
Article-I.D.: ccice1.382
Posted: Sun Mar  2 15:03:08 1986
Date-Received: Tue, 4-Mar-86 04:09:20 EST
Organization: CCI Central Engineering, Rochester, NY
Keywords: scope,variables
List-Id: <comp.lang.ada>


I am somewhat confused about the scope of variables in Ada. I am
attempting to implement a graphics package which uses some variables
which are global to the package, but which I do not want the user to
see. How can I do this?

The package is composed of several subpackages, some of which have
to share data with others, such as list pointers, arrays, etc.
Do I have to declare these variables in the main package? Or can I
declare them in their respective packages and then refer to them
using "use" clauses?

I guess that this problem can be compared to the use of "extern" in
C.

Any help would be greatly appreciated.


			Rick Wessman
			seismo!rochester!ccice5!ccice1!rrw