class Test
  @@class_vble = 1
  attr_accessor :setter_getter_attr
  attr_reader :reader_attr
  attr_writer :writer_attr

  def initialize(param1, param2)
    @instance_vble_p1 = param1
    @instance_vble_p2 = param2

    @setter_getter_attr = 'attr_accessor'
    @reader_attr = 'reader'
    @writer_attr = 'writer'
  end

  def hello
    puts "Hello!!"
  end

  def get_val1
    puts @instance_vble_p1
  end

  def get_writer
    puts @writer_attr
  end

  def get_cl_vble
    @@class_vble += 1
    puts @@class_vble
  end

  private

  def first_private
    puts "I'm private!"
  end

  protected

  def first_protected
    puts "I'm protected!"
  end
end

class AnotherTest < Test
  def another_method
    puts "I belog to AnotherTest"
  end
end

if __FILE__ == $0
  t = Test.new('a', 'b')

  t.hello

  t.get_val1

  puts t.setter_getter_attr
  t.setter_getter_attr = 'Changed!'
  puts t.setter_getter_attr

  puts t.reader_attr

  t.writer_attr = 'Changed!'
  t.get_writer

  t.get_cl_vble

  n = Test.new('c', 'd')
  n.get_cl_vble

  x = AnotherTest.new('e', 'f')
  x.hello
  x.get_val1
  x.get_cl_vble

end