Ruby和整数

Question

我有一个问题是为了更好地理解Ruby如何使用整数运算。

我有一段代码：

class Machine


 @@users = {}

  def initialize(username, password)
    puts "username: #{username}"
    puts "password: #{password}"
    @username = username
    @password = password
    @@users[username] = password
    @files = {}
  end

  def create(filename)
    time = Time.now
    @files[filename] = time
    puts "#{filename} was created by #{@username} at #{time}."
  end

  def Machine.get_users
    @@users
  end
end

my_machine = Machine.new("eric", 01234)

put的输出如下：

username: eric
password: 668

如果密码值为零，那么为什么Ruby会更改密码的值？