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From: garry@batcomputer.tn.cornell.edu (Garry Wiegand)
Newsgroups: comp.lang.fortran,comp.lang.pascal
Subject: Array storage order
Message-ID: <1215@batcomputer.tn.cornell.edu>
Date: Fri, 29-May-87 23:18:12 EDT
Article-I.D.: batcompu.1215
Posted: Fri May 29 23:18:12 1987
Date-Received: Sun, 31-May-87 16:01:05 EDT
Reply-To: garry@oak.cadif.cornell.edu
Organization: Cornell Engineering && Flying Moose Graphics
Lines: 19
Xref: mnetor comp.lang.fortran:109 comp.lang.pascal:164

We're trying to arrange for a C subroutine library to be callable from
Fortran and Pascal and also transportable between machines. 

One of the questions that has come up is with respect to the storage
order of 2-dimensional arrays. In C, array element [1][2] is stored
in memory immediately after element [1][1]. I believe this is locked
into the language - pointer arithmetic and all that. On the Fortran
compilers I can get to, (2,1), not (1,2), immediately follows (1,1).
The pascal I haven't investigated yet.

Question: is this array storage order mandated by the Fortran-77 standard?
How about the Pascal standard?   If so, then I'll document the arrays as being
"backwards" in these languages. If not, I'll keep two code versions. 
Obviously, two manual versions would be less hassle.

Help appreciated.

garry wiegand   (garry@oak.cadif.cornell.edu - ARPA)
		(garry@crnlthry - BITNET)