Vista - OT : DOS 6.20 QBasic, GW-Basic - syntax semantics query

I know that VBScript is not exactly DOS 6.20 QBasic or GW-Basic ; but I
have a syntax semantics query about code written in GW-Basic and now
running in QBasic from DOS 6.20 running in XP sp3.

Perhaps some long-established sage will remember enough to help.

The line is, with the weird term marked,

2390 T = OT: M = OM: O = B(SJ, (M - 1)) + T
^^^^^^^^^^^^^^

It is clear that B is a small non-negative integer, perhaps in the range
0 to 29; OM is either 3 or 4; OT is an integer in the range 1 to 31 ; SJ
is either 0 or 1. The result O is evidently a small integer too.

But what does B(SJ, (M - 1)) mean, and how?

--
(c) John Stockton, nr London UK. ?@merlyn.demon.co.uk IE7 FF2 Op9 Sf3
news:comp.lang.javascript FAQ <URL:http://www.jibbering.com/faq/index.html>.
<URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

On Wed, 12 Nov 2008 22:26:25 GMT, Dr J R Stockton wrote:
B() is just a multi-dimensional array. The selected item (O) is column SJ (SJ
should be a number between zero and... I don't remember), row M - 1 (M should
be a number between one and whatever).

Some of us old fogeys still discuss (and *GASP* use) older BASICs in
alt.lang.basic and comp.lang.basic.misc.

--
Beware a smiling dungeon master.

"Dr J R Stockton" <jrs@xxxxxx> wrote in message
news:e+$K15hRg1GJFw$C@xxxxxxDr John,
There are more than a few older guys in m.p.vb.general.discussion that likely
know the answer...

On Nov 13, 12:18*am, "Auric__" <not.my.r...@xxxxxx> wrote:B(x,y) indeed looks like a two-dimensional array. But what does that
code mean when B is, as I said, a small integer?

--
(c) John Stockton, near London, UK. Posting with Google.
Mail: J.R.""""""""@physics.org or (better) via Home Page at
Web: <URL:http://www.merlyn.demon.co.uk/>
FAQish topics, acronyms, links, etc.; Date, Delphi, JavaScript, ....|

On Thu, 13 Nov 2008 13:56:35 GMT, Dr J R Stockton wrote:
(Sorry I didn't reply sooner, but I was offline yesterday.)

If I understand you correctly, B was declared as an INTEGER, rather than an
INTEGER array, right? Something like "DIM B AS INTEGER"? You can have both
B and B() as separate vars in the same program. (If B() isn't declared
anywhere, then it is a SINGLE array, the default data type for MS BASICs
before VB. Undeclared arrays can have up to 4 dimensions, LBOUND 0 and
UBOUND 10.)

....or am I still not understanding your question? If so, please rephrase
it. :-(

--
Yet even now -- here was the hell of it -- he wasn't completely sure.

Dr J R Stockton schreef:http://www.geocities.com/KindlyRat/GWBASIC.html

;-)

In microsoft.public.scripting.vbscript message <Xns9B5660130C633auricaur
icauricauric@xxxxxx>, Fri, 14 Nov 2008 16:27:31, Auric__
<not.my.real@xxxxxx> posted:There are no declarations. The only statement assigning to B is
B = S - 30 * (INT(S / 30))
where S is a fairly large integer. That amounts to B = S mod 30.

Tests indicate that the dubious part is taken as zero - I'm veering
towards the belief that that part of the program, performed after the
main result is obtained, is best explained as a failed attempt to do a
subsidiary task, not documented = though why SJ, which stands for
Schaltjahr, is thought to be relevant is beyond me.

I was studying that in order to understand something different which is
now understood, so the matter can drop - but thanks.

--
(c) John Stockton, nr London, UK. ?@merlyn.demon.co.uk Turnpike v6.05.
Web <URL:http://www.merlyn.demon.co.uk/> - w. FAQish topics, links, acronyms
PAS EXE etc : <URL:http://www.merlyn.demon.co.uk/programs/> - see 00index.htm
Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc.