On Mon, Feb 25, 2008 at 3:18 PM, Christian Rubio
<chris.rubio.osv@fedex.com> wrote:
> I am completely new to ruby and to OO programming. Why-does my code
> not compile??
>
> class Quadratic
>
> def findroots()
> b = (ARGV[0])
> c = (ARGV[1])
> $stdout.print("You entered " , ARGV[1], ARGV[0], "\n")
> discriminant = b * b - 4.0 * c
> sqroot = Math.sqrt(discriminant)
>
> root1 = (-b + sqroot) / 2.0
> root2 = (-b - sqroot) / 2.0
>
> $stdout.print(root1)
> $stdout.print(root2)
> end
>
> end
>
> if __FILE__ == $0
> qf = Quadratic.new
> qf.findroots
> end

Hi,

First, please, next time post the exact error message. You'll save
people that want to you some investigation.

If the folowing message is similar to your error:
W:/var/x.rb:7:in `*': can't convert String into Integer (TypeError)
from W:/var/x.rb:7:in `findroots'
from W:/var/x.rb:21

then you're trying to multiply numbers by strings.
Replace
> b = (ARGV[0])
> c = (ARGV[1])
by
b = ARGV[0].to_f
c = ARGV[1].to_f
to_f will convert string to float. For more info, read the docs of
String#to_f and possibly the whole String class
(e.g. using RI or http://ruby-doc.org/core/)

If the message is different, please post it and will see.

Jano