Re: C Program confused me

[Alex Yukhimets <aqy6633@acf5.nyu.edu>]

> I encountered following program in one of the Linux Howtos. This calculates
> the value of pai. But how does it do this? I am not asking the programming
> details, but on what theory the formula is based on. Can anybody help? Is
> there any better place to look for help?

First of all, remove ';' after #include instructions :)

The formula is:

4* Integral(from 0 to 1) of 1/(1+x^2) dx = 4 * (arctan(1) - arctan(0))=
4* ( Pi/4 - 0) = Pi

Alex Y.

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