Pi Calculator

[faint545]

I'm writing a program that calculates Pi in C and i'm using a double data structure to store the final result. Double only gives me a certain amount of digits after the decimal point. My question is, what kind of data structure or what method could I use if I potentially wanted to have it calculate 100 digits or more after the decimal point?

[nuzzle]

You need a package for arbitrary-precision arithmetics,

http://en.wikipedia.org/wiki/Arbitra...ion_arithmetic

[0xC0000005]

If your need is to simply determine the digits in PI and not use this extended precision number in any calculations, then all you need is an algorithm. Sorry that I can't suggest one, but a Google search should turn up several sources - or maybe someone here could recommend one.

To clarify: the extended precision digits could be stored in an array of integers or as ASCII characters in a string. Obviously, if stored this way you would not be able to use the value in any calculations.

[faint545]

Thx for the inputs. I'll look into arbitrary precision arithmetic.

[ninja9578]

gmp is a common and easy to use one.