ruby 类创建-继承-消息

#############################################
#create ruby a class
#@符号表示实例变量，相当于java的private 属性
#############################################
class Person
    def initialize(name,age)
        @name    =name
        @age    =age
    end
end

jake = Person.new("jake",18)
#inspect 方法可以发送给任何对象
puts jake.inspect
puts jake.to_s

#为类添加新的属性
class Person
    def to_s
        "Person name=#{@name}-age=#{@age}"
    end
end

she = Person.new("she",18)
puts she.to_s#Person name=she-age=18

###############################
#继承
###############################
class ChinaPerson <Person
    def initialize(name,age,color)
        super(name,age)#使用父类方法
        @color    =color
    end
end

huNanShe = ChinaPerson.new("hunanshe",20,"yellow")
puts huNanShe.to_s#Person name=hunanshe-age=20