class SimpleStack

SimpleStack.rb

class SimpleStack
	def initialize
	  @stack = Array.new
	end

	#removes the first item from the stack and returns the item popped
	def pop 
	  @stack.pop
	end

	#pushes item to stack and returns @stack 
	def push(item) 
	  @stack.push(item)
	end

	def size
	  @stack.length
	end
end