Re: [amibroker] Unable to perform a simple operation

["Tomasz Janeczko" <groups@xxxxxxxxxxxxx>]

Your code is wrong.
Use WriteVal to output numbers with desired number of decimal places or StrFormat.

WriveVal( your_variable, 1.4 ); // output with 4 decimal digits

Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message ----- 
From: "paul_79c" <paulyes@xxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Tuesday, July 14, 2009 5:42 PM
Subject: [amibroker] Unable to perform a simple operation


> Does anyone know why Amibroker is unable to give the correct answer to this:
>
> fh = fopen( "C:/Amibroker/"+Name()+"1.txt", "r");
> if( fh!=0)
> {
> k=StrToNum(fgets(fh));
> fclose(fh);
> }
> fh1 = fopen( "C:/Amibroker/"+Name()+"spread.txt", "r");
> if( fh1!=0 )
> {
> k1=Prec(StrToNum(fgets(fh1)),4);
> fclose(fh1);
> }
> a=Prec(abs((LastValue(C)+k1)-k)+0.0001,4);
>
> I`m using this code on EURUSD trying to perform a simple subtraction but Amibroker is unable to give a precise answer, like for 
> example sometimes 1.3941-1.3931=0.0009 sometimes =0.0010(correct) sometimes 0.0008 or other close value.  dont get it its a simple 
> subtraction, obviously has something to do with floating point does someone know what to do to get the right answer from 
> amibroker?
>
>
>
>
>
>
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------------------------------------

**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.

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