From: Phillip Gawlowski <cmdjackryan@...>
Date: 2011-08-02T05:32:15+09:00
Subject: Re: newbie question

On Mon, Aug 1, 2011 at 10:08 PM, Marc Chanliau <marc.chanliau@gmail.com> wrote:
>
> class Factorial
>  def fact(n)
>    return 1 if n == 0
>    n * fact(n-1)
>  end
> end
>
> my_fact = Factorial.new
> print "enter a positive integer: "
> my_fact = gets.to_i
> puts "factorial: #{fact(my_fact)}"

Let's fix your code:

class Factorial
# Same as your original.
end

factorial = Factorial.new # Creating a new Factorial instance
print "enter a positive integer: "
num = gets.to_i # Assigning input to its own variable!
puts "Factorial: #{factorial.fact(num)}" # calling the fact-method of
your Factorial instance

-- 
Phillip Gawlowski

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A method of solution is perfect if we can forsee from the start,
and even prove, that following that method we shall attain our aim.
              -- Leibniz