Confirmed under QPC2v2 running 2.98.
Norman.
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Norman Dunbar EMail: [EMAIL PROTECTED]
Database/Unix administrator Phone: 0113 289 6265
Lynx Financial Systems Ltd. Fax: 0113 201 7265
URL: http://www.LynxFinancialSystems.com
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-----Original Message-----
From: P Witte [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, May 16, 2001 8:26 AM
To: ql users mailing list
Subject: [ql-users] float
There seem to be some problems with floating point numbers on SMSQ/E
(2.98)
First of all, entering numbers between 2E308 and 9E308 crash Sbasic!
Eg
PRINT 2E308: rem Bang!
Numbers < -9E308 and >9E308 get an Invalid syntax error, which is ok.
But, notice the range has changed!
SMSQ/E allows -1E308 to +1E308 while the old JS did +/-1E610, or
something(?)
Loading up old SuperBasic programs with out-of-range numbers
(according to SMSQ) generates a Mistake. Good! However, you
can Qload such a file without so much as a murmur of the catastrophy
about to ensue: The moment you access the line in any way.. you
guessed it!* Not quite so good.
Ive no idea what happens when a compiled program like that hits SMSQ.
Some more testing has shown that overflow-handling under SBASIC doesnt
seem to work either! Eg the overflow is silently accepted; the error
is only reported on the following use of a float:
100 x=1e308
110 i=0
120 rep
130 i=i+1:print i
140 x=x+x::rem Should overflow immediately
150 endrep
This will first print 1, then stop with an overflow error on line 130
in round two! If you then try to print x..*
Can someone confirm that this is not just a local phenomenon, please.
Per
* Bang!
