#!/usr/bin/ruby
# -*- coding: UTF-8 -*-

$global_variable = 10
class Class1
  def print_global
      puts "全局變量在 Class1 中輸出為 #$global_variable"
  end
end
class Class2
  def print_global
      puts "全局變量在 Class2 中輸出為 #$global_variable"
  end
end

class1obj = Class1.new
class1obj.print_global
class2obj = Class2.new
class2obj.print_global