comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Re: Two Questions

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Two Questions [message #4816 is a reply to message #4815]

Wed, 09 August 1995 00:00

Jackel
Messages: 30
Registered: April 1993

Member

In article <40ag77$dvs@post.gsfc.nasa.gov> offenbrg@fondue.gsfc.nasa.gov (Joel D. Offenberg) writes:

> 1. Global variables do not exist. However, "Common blocks" can be used to
> achieve the same effect. (A "common block" is a group of variables which
> are declared in each function/procedure, but retain their values when out of
> scope, and can be declared in as many functions/procedures as you wish).

While "Global" variables do not exist, System variables do. These are created
with the procedure DEFSYSV, and are globally visible. They can also be
made Read_Only, so that functions cannot change them. Personally, I prefer
common blocks, but the original poster might want to give both possibilities a
try.

Brian Jackel
University of Western Ontario

Report message to a moderator

[Message index]

		Re: Two Questions By: dave on Wed, 09 August 1995 00:00
		Re: Two Questions By: Jackel on Wed, 09 August 1995 00:00
		Re: Two Questions By: offenbrg on Wed, 09 August 1995 00:00
		Re: Two Questions By: davis on Tue, 08 August 1995 00:00

Previous Topic:	overlaying sat image on base map??
Next Topic:	No forward_pro statement !!!!

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 07:04:06 PDT 2025

Total time taken to generate the page: 0.63944 seconds