#---
# Excerpted from "Programming Ruby 1.9",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material, 
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose. 
# Visit http://www.pragmaticprogrammer.com/titles/ruby3 for more book information.
#---
class BookInStock      
  
  attr_reader :isbn, :price
  
  def initialize(isbn, price)
    @isbn  = isbn
    @price = Float(price)
  end  

  # .. 
end

book = BookInStock.new("isbn1", 12.34)
puts "ISBN   = #{book.isbn}"
puts "Price  = #{book.price}"
