gistfile1.rb

class Rectangle < Object
  @@num_rects = 0

	attr_reader :width, :height

	def initialize(width, height)
		@width = width
		@height = height
		@@num_rects += 1
	end

	def num_rects
		@@num_rects
	end

	# def width
	# 	@width
	# end

	# def height
	# 	@height
	# end

	def area
		@width * @height
	end

end

class Square < Rectangle

	def initialize(side)
		super(side, side)
	end

	def area
		@width**2
	end

end