#!/usr/bin/ruby -w class Box # 初始化类变量 @@count = 0 def initialize(w,h) # 给实例变量赋值 @width, @height = w, h @@count += 1 end def self.printCount() puts "Box count is : #@@count" end end # 创建两个对象 box1 = Box.new(10, 20) box2 = Box.new(30, 100) # 调用类方法来输出盒子计数 Box.printCount()