decimal representation

[Nicholas Dimas]

Hi folks.  I am trying to write a program that does Gaussian quadrature in C.
The problem is, the zeros of the Legendre polynomials and their associated
weights are made up of at least 21 digits( the fraction ).  Is it 
necessary to use all these digits?  If so, how do I represent these numbers
in C?  If not, do I truncate or round or what?  By the way, I am getting these
numbers from a table in "Abramowitz & Stegun: Mathematical Functions & Tables".

Please send mail via Internet:

			ndimas at pikes.denver.colorado.edu


				Thank You
				Nicholas Dimas