lorena.rb

class Teste
  include Enumerable

  attr_reader :n
  
  def initialize(n)
    @n = valid?(n) ? n.to_i : 100
  end
  
  def each
    return enum_for :each unless block_given?

    (1..n).each { |i| yield i }
  end
  
  def print
    each { |i| print_text(i) }
  end
  
  private
  
  def print_text(i)
    if i % 3 == 0 && i % 5 == 0
      puts 'Banana Maçã'
    elsif i % 3 == 0
      puts 'Banana'
    elsif i % 5 == 0
      puts 'Maçã'
    else
      puts i
    end
  end
  
  def valid?(i)
    n.to_i > 0
  end
end

teste = Teste.new(ARGV[0])

teste.each do { |i| puts "Yielded #{i}!" }

teste.print