require 'calc/version'
require 'calc/calc'

module Calc
  class Calc
    def initialize
      @numbers = Array.new
    end

    def get(*args)
      @numbers.push(args).flatten!
    end

    def plus
      res = @numbers.reduce(&:+)
      wipe
      res || 0
    end

    def minus
      - plus
    end

    private

    def wipe
      @numbers = []
    end
  end
end