How to..

[Dzemo]

i have string "2+6/3-8/2" and how to get result (in this case is 0). String
can be any formula with 4 basic math operations
thx

 

[Scott M.]

You shouldn't approach the problem this way unless you want to write a LOT
of regular expression code! Instead the input should come in pieces. The
math operators should be determined by one input mechanism and the data
another, not all together. This is very poor design.

 

[Cor Ligthert]

Dzemo,

The only think I know about it is this link

http://www.eggheadcafe.com/articles/20030908.asp

I hope this helps?

Cor

 

[Guest]

Hi Dzemo

I'm tempted to say use JScript.NET!!

Try this:

1. Create a file called: DynamicMath.js
2. Add this code to it:

class DynamicMath
{
static function Eval(MathExpression : String) : double
{
return eval(MathExpression);

};
}

3. Compile it with the command line jsc compiler: jsc /t:library
DynamicMath.js
4. Add a reference to DynamicMath.dll to your project (and to
Microsoft.JScript.dll as well)
5. Use from your favourite .NET language:
Dim d As Double = DynamicMath.Eval("2 + 3 + 4")
MessageBox.Show(d)
6. That's it..

HTH

Nigel Armstrong

 

[Herfried K. Wagner [MVP]]

i have string "2+6/3-8/2" and how to get result (in this case is 0). String
can be any formula with 4 basic math operations

MathLib
<URL:http://palmbytes.de/content/dotnet/mathlib.htm>