#!/usr/bin/env ruby
 
class Door
  HINGED_DOOR_WITH_KNOB = 0
  HINGED_DOOR_WITHOUT_KNOB = 1
  SLIDING_DOOR = 2
 
  OPENED = 0
  CLOSED = 1
  BROKEN = 2
 
  def initialize(type = HINGED_DOOR_WITH_KNOB)
    @doorType = type
    @doorStatus = CLOSED
  end
 
  def setType(type)
    @doorType = type
  end
 
  def open
    @doorStatus = OPENED if @doorType == HINGED_DOOR_WITHOUT_KNOB
  end
 
  def close
    @doorStatus = CLOSED
  end
 
  def getType
    @doorType
  end
 
  def getStatus
    @doorStatus
  end
end
 
class Cat
  MALE = 0
  FEMALE = 1
 
  WHITE = 0
  BLACK = 1
 
  def initialize(name = "ぬこ", weight = 4.5, sex = MALE, color = WHITE)
    @name = name
    @weight = weight
    @sex = sex
    @color = color
  end
 
  def setName(name)
    @name = name
  end
  def setWeight(weight)
    @weight = weight
  end
 
  def setColor(color)
    @color = color
  end
 
  def setSex(sex)
    @sex = sex
  end
 
  def openDoor(door)
    def door.open
       raise "よくぞ我を開けようと試みたな……死をくれてやる……！"
    end
 
    begin
      door.open
    rescue => e
      raise e.exception "#{e.message} とかいわれたのでねるにゃー(棒)"
    end
  end
 
  def canOpenDoor(door)
    door.instance_variable_set(:@doorType, Door::HINGED_DOOR_WITHOUT_KNOB)
    door.getType == Door::HINGED_DOOR_WITHOUT_KNOB
  end
 
  private
  def method_missing(name, args)
    if name == :setSex
      puts "性転換なんてごめんにゃー！ ほうふくてろにゃー！"
      return
    end
  end
end
 
door = Door.new
cat = Cat.new("ぬこ", 10.0, Cat::MALE, Cat::WHITE)
Cat.class_eval { remove_method :setSex }
 
cat.setSex(Cat::FEMALE)
cat.openDoor(door) if cat.canOpenDoor(door)
 

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