sample-2.gb

class User
  def initialize(name, age)
      @name = name
      @age = age
  end

  def name
      @name
  end

  def age
      @age
  end

  def say_hi(user)
      puts(@name + " says hi to " + user.name)
  end

  def self.sum_age(user1, user2)
      user1.age + user2.age
  end
end

stan = User.new("Stan", 22)
john = User.new("John", 40)
puts(User.sum_age(stan, john)) #=> 62
stan.say_hi(john) #=> Stan says hi to John