From: Jan Hendrickx <jan@...>
Date: 2011-12-16T22:22:18+09:00
Subject: Re: Rounding error?

WOW! You guys are realy fast :)))

Vimal R. wrote in post #1037007:
> I use Ruby 1.8.7. What version are you using?

I'm using Ruby 1.9.3; downloaded it yesterday, so I suppose that's the
latest stable version.


Peter Vandenabeele wrote in post #1037008:
> [Dutch: Dag Jan, welkom op de lijst]

[Dutch: Hoi Peter, bedankt voor de verwelkoming :)]

> Try to use BigDecimal.
> http://www.ruby-doc.org/stdlib-1.9.3/libdoc/bigdecimal/rdoc/BigDecimal.html

I changed the test-program like this:

require 'bigdecimal'
print("Length: ")
s = gets()
length = BigDecimal.new(s)
print("Width: ")
s = gets()
width = BigDecimal.new(s)
surface = length * width
puts("Surface = #{length.to_f} x #{width.to_f} = #{surface.to_f}")

It works fine now, but, well... I don't think it's very 'elegant'...
I haven't had the time yet to read the page on BigDecimal, but I'll do
that right now.

Mike Stok wrote in post #1037010:
> It you're interested in some reading about floating point then
> http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html is worth
> looking at.

I'll go and have a look at that too...


Greetings, and thanks to all!
Janosik.

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