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From: "robin" <robin_v@bigpond.com>
Newsgroups: comp.lang.ada,comp.lang.fortran,comp.lang.pl1
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Subject: Re: Ada vs Fortran for scientific applications
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Message-ID: <4vXsg.3183$tE5.1981@news-server.bigpond.net.au>
Date: Wed, 12 Jul 2006 00:37:20 GMT
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Xref: g2news2.google.com comp.lang.ada:5631 comp.lang.fortran:11962
 comp.lang.pl1:1998
Date: 2006-07-12T00:37:20+00:00
List-Id: <comp.lang.ada>

John W. Kennedy wrote in message ...
>robin wrote:
>> John W. Kennedy wrote in message <2Nwsg.210$Dp4.31@fe09.lga>...
>>> adaworks@sbcglobal.net wrote:
>>>> "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message
>>>> news:1kzktalo9krea$.z8n9wev45xct$.dlg@40tude.net...
>>>>> On Sun, 09 Jul 2006 21:36:07 GMT, James Giles wrote:
>>>>>
>>> PL/I is too old (1964) to have the range trick,
>>
>> Can be handled by ASSERT.
>>
>>> but it does at least
>>> strive for portability by specifications such as:
>>>
>>>    Declare My_number_2 fixed binary(8,0);
>>>
>>> If the (SIZE) option is turned on, it will at least check that the range
>>> is between -511 and +511.
>>
>> Actually, -512 to +511.
>
>No, PL/I does not demand 2's-complement representation.

On the contrary, your statement is wrong.
PL/I at least checks -512 to +511.
It may (on a ones complement or sign-magnitude machine),
check a smaller range of -511 to +511.

The S/360 and successors checked -512 to +511,
not the smaller range that you mentioned.

On the PC, the range checked is -512 to +511.