On Sat, 2007-09-01 at 09:41 -0500, Michael Hennebry wrote: > How much precision do you need? On what? Why? > > At least one person wrote a book on implementing the C standard library. > It would probably be a better resource than Numerical Recipes. That would be PJ Plauger's The Standard C Library, Prentice Hall, 1992 0-13-131509-9. Most of his math lib implementation is based on Cody and Waite, Software Manual for the Elementary Functions, Prentice Hall, 1980 (sorry, he doesn't give the ISBN). -- Matthew Saltzman Clemson University Math Sciences mjs AT clemson DOT edu http://www.math.clemson.edu/~mjs