Ruby attr_accessor 使用，Ruby @成员变量 与 临时变量

#Class describ ------rdoc rules
#= headers
#this is header content
#== sub header
# this is sub header content
#=== sub sub header
# this is sub sub header
class Animal
 
 attr_accessor :name    #-------------①
 
 #this is the comment for the  'new' method !
 
 def initialize type
    name = type         #-------------②
 end
 
 #this is comment for 'shout' method 
 # Second Line
 #* this is sub line 1
 #* this is sub line 2
 
 def shout
    if name == 'dog'
        puts "wang! wang!"
    elsif name == 'cat'
        puts "miao! miao!"    
    elsif name ==nil
        puts "nil"
    else
        puts "kao!"
    end    
 end
 
end

dog = Animal.new "dog"
puts dog.name
dog.shout
dog.name= "cat"
dog.shout

本程序输出为：

nil

miao! miao!

-----------------

①： 成员变量

②： 临时变量

attr_accessor 表示后面的为类成员，同时为其提供外部访问能力。即相当于为其提供 get;  set;