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class Person
 
  def initialize( name,age=18 )
    @name = name
    @age = age
    @motherland = "China"
  end
 
  def talk
    puts "my name is "+@name+", age is "+@age.to_s
    if  @motherland == "China"
      puts "I\'m Chinese."
    else
      puts "I\'m foreigner."
    end
  end
 
  attr_writer :motherland
 
end
p1=Person.new("kaichuan",20)
p1.talk
p2=Person.new("Ben")
p2.motherland="ABC"
p2.talk
³ÌÐòÔËÐнá¹û
 my name is kaichuan, age is 20
I'm Chinese.
my name is Ben, age is 18
I'm foreigner.
>Exit code: 0
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def motherland=(value)
   return @motherland =value
end
ÄÇôÏàÓ¦µÄget·½·¨Îª attr_ reader :motherland
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def motherland
  return @motherland
end
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