Help 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