Equation Interpreter

CSC6...@leeds.ac.uk (J.A. Cruickshank)

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Equation Interpreter

Is there a place where I can get some code that will intepret an equation and
then pass it into a function for use within the rest of the program.

Any help is greatly appreciated.

Please reply to my mail address as I cannot read the newsgroups too often.

James

Timo Sal

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Re:Equation Interpreter

In article <65c84d$9i0_...@leeds.ac.uk>,

Quote

J.A. Cruickshank <CSC6...@leeds.ac.uk> wrote:

:Is there a place where I can get some code that will intepret an equation and

If you mean paring an expression then you first might wish to take a
look at the FAQ, if you have not already done so:

126643 Nov 14 1997 ftp://garbo.uwasa.fi/pc/link/tsfaqp.zip
tsfaqp.zip Common Turbo Pascal Questions and Timo's answers

All the best, Timo

....................................................................
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Moderating at ftp:// & http://garbo.uwasa.fi/ archives 193.166.120.5
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Robert Metcal

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Re:Equation Interpreter

Quote

J.A. Cruickshank wrote:

> Is there a place where I can get some code that will intepret an equation and
> then pass it into a function for use within the rest of the program.

> Any help is greatly appreciated.

> Please reply to my mail address as I cannot read the newsgroups too often.

> James

I am studying a double A-Level in maths. In a book I read that this is
one of the few things a computer can't do.

I mean 24X+X=Y is the same as 25X=y is the same as
50X=2Y is the same as 2(5X+5X+2)-4+5X=y infact, it has been
proven by some great mathmatichan that there are infinite
rearragments. He also proved that it was impossible to create
an algrothym to do it.

Pedt Scrag

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Re:Equation Interpreter

In article <65c84d$9i0_...@leeds.ac.uk>, "J.A. Cruickshank"
<CSC6...@leeds.ac.uk> writes

Quote

>Is there a place where I can get some code that will intepret an equation and
>then pass it into a function for use within the rest of the program.

>Any help is greatly appreciated.

>Please reply to my mail address as I cannot read the newsgroups too often.

If you are looking for a parser for something like 2*3+56*10-8 then have
a look at http://www.pedt.demon.co.uk/ and the Usenet link for Pascal
Caluclator Unit.
--
Pedt Scragg <postmas...@pedt.demon.co.uk>

In principle, is there uncertainty that
Heisenberg was working his best in chaos?

Tony Curti

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Re:Equation Interpreter

Quote

On Wed, 26 Nov 1997, Robert Metcalf wrote:
> J.A. Cruickshank wrote:

> > Is there a place where I can get some code that will intepret an equation and
> > then pass it into a function for use within the rest of the program.

> > Any help is greatly appreciated.

> > Please reply to my mail address as I cannot read the newsgroups too often.

> > James
> I am studying a double A-Level in maths. In a book I read that this is
> one of the few things a computer can't do.

> I mean 24X+X=Y is the same as 25X=y is the same as
> 50X=2Y is the same as 2(5X+5X+2)-4+5X=y infact, it has been
> proven by some great mathmatichan that there are infinite
> rearragments. He also proved that it was impossible to create
> an algrothym to do it.

I too studied double A-Level maths... It is virtually impossible to write
an algorithm to prove that two dissimmilar formulae are equivalent for
all cases.

However, what I think the original poster wanted was some tools to create
a parser to interpret the formula into a computer usuable function. To
this end, there is a Pascal version of LEX and YACC available which would
enable the creation of a Pascal parser. If I remember correctly, it comes
with some sample code/grammers which would parse simple arithmatic and
write the result to the screen.

Unfortunately, I cannot remember the name of the file... I think it is
TPLY???.ZIP (or something like that).

Regards,
Antony.

ssu95...@reading.ac.uk
Author of PowerMOD/2

... There are four kinds of lies:
... There are lies,
... Damned lies...
...
... And party political broadcasts.

[END]

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