进入rub.cmd

命令行敲irb:

执行ruby test01.rb

实例化

class Player
    def initialize(name="Koma")
        @name=name
    end

    def show()
        puts"player:#{@name}"
    end
end

koma=Player.new()
koma.show()

bobo=Player.new("bobo")
bobo.show()