From: Tomi Zzzz <tomi_z@...>
Date: 2008-09-14T21:18:45+09:00
Subject: how do deal with huge numbers and keep them accurate?

Hello all, I wrote the following code:

require "bigdecimal"
require "bigdecimal/math"
include BigMath
odd = gets.chomp.to_f
result = odd/3.0
puts result.to_f
blank = gets.chomp

the code works just fine when the input is upto 15 digits, but
afterwards the code fails to give the correct output.

a few good examples:
odd=1231231
result=410410.333333333

odd=123123123123121    (15 digits)
result=41041041041040.3

so far so good,now:
odd=1231231231231231   (16 digits)
result=4.1041041041041e+014     (given with no remainder)
   [It's a wrong answer! the result should have been  ---
410410410410410.33333]

What do i need to chance in the code to make it happen?
in the future i should deal with larger numbers and the accuracy is
essential.

thanks in advanced, tomi.
-- 
Posted via http://www.ruby-forum.com/.