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Handling calculations with many decimal places

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Handling calculations with many decimal places

Subject: Handling calculations with many decimal places
From: Ian Piper <email@hidden>
Date: Tue, 03 Nov 2009 14:18:07 +0000

Hi,

I am writing an implementation of the Brent-Salamin algorithm for calculating pi. I want to be able to display potentially a large number of decimal places in the result (hundreds at least). However I am finding that even using long double values in my calculation gives me only the first 50 or so decimal places. Is this a limitation of long double that I am running into here?

Should I be using NSDecimal instead to do this kind of calculation? If so, can anyone point me at a good example of its use as I am struggling with how to use it?

Thanks,


Ian.
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