Re: Getting stranger values in subtraction

Thank you so much :)

I modified the relevant line of code as follows based on the pointers above, and it seems to have solved the anomaly:

        #$session->param('CART')->{total_amount} -= $amount;
        $session->param('CART')->{total_amount} = sprintf "%.2f", $ses
+sion->param('CART')->{total_amount} - $amount;
[download]

Do we get the same problem with addition?

Comment on Re: Getting stranger values in subtraction Download Code

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Re^2: Getting stranger values in subtraction by Anonymous Monk on Feb 06, 2016 at 09:20 UTC
Do we get the same problem with addition? What happens when you try it to see? Its Floating point arithmetic , and arithmetic includes addition	[reply]
Re^2: Getting stranger values in subtraction by Anonymous Monk on Feb 06, 2016 at 09:06 UTC
Addendum: The issue seems to surface if the arithmetic takes place in a loop, when you do the subtraction (or addition as well?) multiple times. I don't seem to get this problem when the subtraction happens only once in a subroutine (not in a loop).	[reply]
Re^3: Getting stranger values in subtraction by poj (Abbot) on Feb 06, 2016 at 09:11 UTC
This might be a solution for you Math::FixedPoint poj	[reply]
Re^3: Getting stranger values in subtraction by choroba (Cardinal) on Feb 06, 2016 at 09:10 UTC
Have you run the code in my reply? There's no loop involved. Also, have you clicked the link provided there and read the article? It answers your question about adition clearly. ($q=q:Sq=~/;[c](.)(.)/;chr(-\|\|-\|5+lengthSq)`"S\|oS2"`map{chr \|+ord }map{substrSq`S_+\|`\|}3E\|-\|`7**2-3:)=~y+S\|`+$1,++print+eval$q,q,a, [download]	[reply] [d/l]
Re^4: Getting stranger values in subtraction by Anonymous Monk on Feb 06, 2016 at 09:26 UTC
Yes, I ran your code, and then modified mine based on it after that. Hmm...I am still puzzled why I haven't seen that kind of anomaly in other parts of my code that do this sort of arithmetic even though I have been testing it for weeks now.	[reply]