Xref: utzoo comp.lang.fortran:2375 comp.os.vms:16987
Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!orstcs!nucthy!ghe
From: ghe@nucthy.physics.orst.edu (Guangliang He)
Newsgroups: comp.lang.fortran,comp.os.vms
Subject: Re: Question about variables local to subroutine
Keywords: Local variables, subroutines
Message-ID: <12181@orstcs.CS.ORST.EDU>
Date: 23 Aug 89 06:21:09 GMT
References: <24891@iuvax.cs.indiana.edu>
Sender: usenet@orstcs.CS.ORST.EDU
Reply-To: ghe@nucthy.PHYSICS.ORST.EDU (Guangliang He)
Organization: Dept. of Physics, Oregon State University
Lines: 25

In article <24891@iuvax.cs.indiana.edu> templon@silver.bacs.indiana.edu (jeffrey templon) writes:
=
=I would like to know one simple (I hope) thing: what happens if you set
=the value of a variable (local) in a subroutine, exit the subroutine, and
=come back later?  Is it the same value, zero, or worse?  I read all TFMs
=I could find and saw no answer to this one.  I am using VAX Fortran,
=whatever version runs on VMS V4.6.  Thanks for any help you can send.
=
=					Jeff Templon


As my understanding, Fortran 77 standard does NOT save the value of a local
variable unless you use save in the subroutine. But I am not very sure about
the detail. A lot of compilers do save the value of local variables. The
Unix f77 does it. But I have heard the oppesite case. The Mac Fortran
doesn't save them. You should read the manual carefully to see how VAX
Fortran does these kind things.
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