> 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. -- _ _( )_ ( (o___ +-------------------------------------------+ | _ 7 | Alexander Yukhimets | \ (") | http://pages.nyu.edu/~aqy6633/ | / \ \ +-------------------------------------------+