myself!
Tony Tebby
- Original Message -
From: Dave Walker [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: samedi 15 mars 2003 00:06
Subject: Re: [ql-users] Sbasic and numbers
TonyTebby writes:
No need for fancy modifications - the SBASIC arithmetic routines already
check the types of the variables involved in calculations and do different
operations for integers and floats. All you need to do is detect
string{+-*/}string and do string arithmetic with string
PS.
Out of interest, I thought I'd see how long my calculator takes to
calculate pi. On my P1.7, it does it to 31567 digits in just under a
minute (58.33s), and (leaving it running overnight) it took 10 hours, 10
minutes and 50 seconds to do it to its maximum precision of 315643 digits.
I
Hi Per,
Thanks for your reply.
Regards,
Franois Van Emelen
P Witte wrote:
Franois Van Emelen writes:
snip
Use a string variable in DBAS instead of a float and use the sort of
routines I described to do the calculations.
Didnt someone write an IEEE fp (64 or 80 bit) emulation package for the QL?
On 14 Mar 2003 at 7:35, Dave Walker wrote:
The hardest part will be to get agreement on the SB interface needed to
support what is wanted.
Probably the best would be to have functions to which pass the numbers as strings
to/from the package (eg result$=HP_ADD (number1$,number2$)).
The
On Thu, 13 Mar 2003 at 23:55:51, P Witte wrote:
(ref: [EMAIL PROTECTED])
Tony Firshman writes:
Monetary calculations normally only require the four basic
operations, add, subtract, multiply and divide.
Surely two only - addition and subtraction?
Multiplication and division are shorthand for
.
Dave
- Original Message -
From: [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Friday, March 14, 2003 8:35 AM
Subject: Re: [ql-users] Sbasic and numbers
On 14 Mar 2003 at 7:35, Dave Walker wrote:
The hardest part will be to get agreement on the SB interface needed to
support
Tony Firshman writes:
I once had an old mechanical calculating
machine, given to me by my grandfather to play with when the bank he
worked
for upgraded to electro-mechanical ones. I later used it for my homework,
the only kid at school with access to a calculator, (something I had to
keep
Dave Walker writes:
If there really is a need for these extra precision routines to be
available
from SB, then maybe it would be worth writing SB wrappers for the maths
support routines used by c68? These include support for IEEE 32,64 and
80
bit, and also for 64 bit integers with
2) Internal coercion within the package, eg
result$ = HP_ADD(fp64$, fp80$) or even
result$ = HP_ADD(int64$, qdosfp)
This would probably be the way to go. Less likely to get user error that
way. As the strings would be opaque data from the programmers perspective
it would be easy to
Franois Van Emelen writes:
It is not too difficult to write your own fixed
or floating point routines in Basic using basic school maths, but they
would
be relatively slow. (The book Mathematics on the Sinclair QL, by Czes
Kosniowski (out of print) might provide a suitable starting
?)
Claude
-Message d'origine-
De : P Witte [mailto:[EMAIL PROTECTED]
Envoy : jeudi 13 mars 2003 11:21
: [EMAIL PROTECTED]
Objet : Re: [ql-users] Sbasic and numbers
Franois Van Emelen writes:
It is not too difficult to write your own fixed
or floating point routines in Basic using
On Thu, 13 Mar 2003 at 10:20:57, P Witte wrote:
(ref: [EMAIL PROTECTED])
François Van Emelen writes:
It is not too difficult to write your own fixed
or floating point routines in Basic using basic school maths, but they
would
be relatively slow. (The book Mathematics on the Sinclair QL,
François Van Emelen wrote:
And here comes my original question again:
Is there a way to get the original value.
No. As I already said, FP does not have enough precision. A FP value
just cannot hold 12345678.55.
Again: never store currency values as a FP value. A FP value could by
the way
Tony Firshman writes:
Monetary calculations normally only require the four basic
operations, add, subtract, multiply and divide.
Surely two only - addition and subtraction?
Multiplication and division are shorthand for
addition/subtraction in my book.
... or am I being too simplistic.
It all
Franois Van Emelen writes:
Thank you for your 'ADD$' function, but it doesn't solve my problem.
I'll rephrase my question with a concrete example:
A DBAS-file is open. One of the fields is of type 3 (floating point)
The user wants to update that field.
That could be done with something
is wanted.
Dave
- Original Message -
From: P Witte [EMAIL PROTECTED]
To: [EMAIL PROTECTED] [EMAIL PROTECTED]
Sent: Friday, March 14, 2003 12:11 AM
Subject: Re: [ql-users] Sbasic and numbers
Franois Van Emelen writes:
Thank you for your 'ADD$' function, but it doesn't solve my problem
P Witte wrote:
Yes, the Psion suite has its own fp routines (more precision (14 (16)
digits) but less magnitude). It is not too difficult to write your own fixed
or floating point routines in Basic using basic school maths, but they would
be relatively slow. (The book Mathematics on the
Norman Dunbar wrote:
Morning Franois,
snip
QDOSMSQ's main problem , as you have found, is not so much the range of
numbers that can be represented, but the way that the software displays it.
I'm sure some of the procedure wriuters amongst us, who understand these
floating point things (I don't
QDOSMSQ's main problem , as you have found, is not so much the
range of
numbers that can be represented, but the way that the software displays it.
I'm sure some of the procedure wriuters amongst us, who understand these
floating point things (I don't !), could write a routine to take in
In a message dated 11/03/03 03:40:54 GMT Standard Time, [EMAIL PROTECTED] writes:
As a final digression, I've always bemoaned the fact that floating point
is only allowed a twelve bit exponent. It could have gone for 15 bits,
which would have reduced the overall code and increased the speed!
3 or 6
bytes ?
-Message d'origine-De: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]Envoy: mercredi 12 mars 2003
16:00: [EMAIL PROTECTED]Objet: Re:
[ql-users] Sbasic and numbersIn a message dated 11/03/03 03:40:54 GMT
Standard Time, [EMAIL PROTECTED] writes:
As a final
Mourier 00
[mailto:[EMAIL PROTECTED]Sent: Wednesday, March 12, 2003 3:03
PMTo: '[EMAIL PROTECTED]'Subject: RE: [ql-users]
Sbasic and numbers
3 or 6
bytes ?
-Message d'origine-De: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]Envoyé: mercredi 12 mars 2003
16:00À: [EMAIL PROTECTED
On 12 Mar 2003 at 10:00, [EMAIL PROTECTED] wrote:
(...)
. Otherwise Qdos is just the old fashioned 3-byte 32 bit mantissa, 12
bit exponent.
Hmmm 32 bits + 12 bits in 3 bytes? Interesting.
(just teasing!)
Wolfgang
John Taylor wrote:
Francois
It is a long time since I had this problem but I found out very early in my
QL days that if you tried to print a decimal figure with a leading zero it
would display it exponotional. eg. .01 = 1.1E-2
This also applied to numbers with more than six decimal places.
I
Claude Mourier 00 wrote:
Marcel gives already the right (and only ?) answer : always use integer
representation for number then convert them with IDEC$/FDEC$.
Sad method as this slow down a lot the process.
Claude
Sorry for the delay, but I couldn't reply earlier; UPC (cable company)
was down
[EMAIL PROTECTED] wrote:
On 10 Mar 2003 at 13:36, François Van Emelen wrote:
Hi all,
How can I force Sbasic to display correct and readable numeric values?
Here is an example of what I mean.
(rest cut)
Why not use print_using?
Mind you, as Marcel pointed out, this does not get rid of the
PROTECTED]
Envoyé : mardi 11 mars 2003 12:27
À : [EMAIL PROTECTED]
Objet : Re: [ql-users] Sbasic and numbers
Claude Mourier 00 wrote:
Marcel gives already the right (and only ?) answer : always use integer
representation for number then convert them with IDEC$/FDEC$.
Sad method as this slow down
Hi François
This routine is slow, but may do the job.
Cheers
Malcolm
100 DEFine FuNction convert(a)
110 a$=a
120 ep='E-' INSTR a$
130 IF ep
140 e=a$(ep+2 TO)
150 IF '.' INSTR a$ THEN a$=a$(1)a$(3 TO ep-1):ELSE a$=a$(1 TO ep-1)
160 a$='.'FILL$('0',e-1)a$
170 END IF
180 RETurn a$
190 END
Hi Malcolm,
Thanks for the 'convert' function.
I certainly will try it.
Regards
François Van Emelen
Malcolm Lear wrote:
Hi François
This routine is slow, but may do the job.
Cheers
Malcolm
100 DEFine FuNction convert(a)
110 a$=a
120 ep='E-' INSTR a$
130 IF ep
140 e=a$(ep+2 TO)
150 IF '.'
On Tue, 9 Mar 2004 17:31:54 +, Tony Firshman [EMAIL PROTECTED]
wrote:
Tony your date is set in 2004... Are you experiencing Time warp?
:-)
Phoebus
--
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/
On Tue, 11 Mar 2003 at 16:14:30, Phoebus Dokos wrote:
(ref: [EMAIL PROTECTED])
On Tue, 9 Mar 2004 17:31:54 +, Tony Firshman [EMAIL PROTECTED]
wrote:
Tony your date is set in 2004... Are you experiencing Time warp?
:-)
It is a pain. My local time is fine (synchronised to the atomic clock)
Hi all,
How can I force Sbasic to display correct and readable numeric values?
Here is an example of what I mean.
160 v10=.123
170 v11=.011
180 r10=v10-v11
190 print v10,v11,r10
200 rem v10 returns .123 readable=yes, correct=yes
210 rem v11 returns 1.1E-2 readable=no, correct=? , should
François Van Emelen wrote:
210 rem v11 returns 1.1E-2 readable=no, correct=? , should display .011
1.1E-2 means 1.1 * 10^(-2) = 1.1 * 0.01 = 0.011
This is by the pretty similar to the way the number is saved
internally.
240 v20=12345678.123
250 v21=12345678.011
260 r20=v20-v21
in the
correct place.
If I am honest I should say I have forgotten how I did it.
From: François Van Emelen [EMAIL PROTECTED]
Reply-To: [EMAIL PROTECTED]
Date: Mon, 10 Mar 2003 13:36:38 +0100
To: QL users list [EMAIL PROTECTED], François Van Emelen
[EMAIL PROTECTED]
Subject: [ql-users] Sbasic
13:37
À : QL users list; François Van Emelen
Objet : [ql-users] Sbasic and numbers
Hi all,
How can I force Sbasic to display correct and readable numeric values?
Here is an example of what I mean.
160 v10=.123
170 v11=.011
180 r10=v10-v11
190 print v10,v11,r10
200 rem v10 returns
On Mon, 10 Mar 2003 at 15:45:29, Claude Mourier 00 wrote:
(ref: [EMAIL PROTECTED])
Marcel gives already the right (and only ?) answer : always use integer
representation for number then convert them with IDEC$/FDEC$.
Sad method as this slow down a lot the process.
This is no good for QDOS -
?
I never notice a problem as far as there is no more than 9 digits envolved
... except it's slow
-Message d'origine-
De : Tony Firshman [mailto:[EMAIL PROTECTED]
Envoye : lundi 10 mars 2003 17:32
A : [EMAIL PROTECTED]
Objet : Re: [ql-users] Sbasic and numbers
On Mon, 10 Mar 2003
On Mon, 10 Mar 2003 at 17:44:27, Claude Mourier 00 wrote:
(ref: [EMAIL PROTECTED])
De : Tony Firshman [mailto:[EMAIL PROTECTED]
Envoye : lundi 10 mars 2003 17:32
A : [EMAIL PROTECTED]
Objet : Re: [ql-users] Sbasic and numbers
On Mon, 10 Mar 2003 at 15:45:29, Claude Mourier 00 wrote:
(ref
On 10 Mar 2003 at 13:36, François Van Emelen wrote:
Hi all,
How can I force Sbasic to display correct and readable numeric values?
Here is an example of what I mean.
(rest cut)
Why not use print_using?
Mind you, as Marcel pointed out, this does not get rid of the calculation
errors, but it
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