I have found a great database of snippets, codes, sources of functions and libraries in C programming language (works for C++ too, of course).
You can find Assorted math functions along with Various ways of computing PI to ridiculous lengths and many many more.
Here is the link :
http://c.snippets.org/browser.php

Thanks a lot dude!

Can't pi be approximated to any value we want with the current technology, or do we have a finite calculation of it?

wow... impressive find... thx for sharing... it will be sure in use sometimes, all that functions...

(03-05-2010 05:12 AM)Back_track Wrote:  Can't pi be approximated to any value we want with the current technology, or do we have a finite calculation of it?

Well basically we use pi in loads of calculations and when we round it on some value that is just because we need accuracy on some number of decimals.
And it is impossible to find infinite value of pi, but it is possible to calculate it on how many decimals we want.
Pi is calculated using this row :

And i made a program for calculation on 11 decimals (because real type in Pascal and float in C++ use approximation on to 11 decimals) :
http://www.pro9ramming.com/pi-calculation-t-285.html
In school we use approximation pi=3,14, because we do not need more accuracy than 2 decimals, but in science i think that biggest number of decimals is 33 and no more, so that is all we need.
I think i gave a good explanation !