More Complicated Inheritance: Bloc.io

complicated_inheritance.rb

class Shape
  attr_accessor :color

  def initialize(color = nil)
    @color = color || 'Red'
  end

  def larger_than?(shapeType)
    if self.area >= shapeType.area
      true
    else
      false
    end
  end

end

class Rectangle < Shape
  attr_accessor :width, :height

  def initialize(width, height, color = nil)
    @width, @height = width, height
    super(color) # this calls Shape#initialize
  end

  def area
    @width * @height
  end
end

class Square < Rectangle

  def initialize(side, color = nil)
    super(side, side, color) # this calls Shape#initialize
  end

end

class Circle < Shape
  attr_accessor :radius

  def initialize(radius, color = nil)
    @radius = radius
    super(color) # this calls Shape#initialize
  end

  def area
    Math::PI * (@radius * @radius)
  end
end

c = Circle.new(3)
p c.area

s = Square.new(13)
puts s.color