在做 super 测试时，按照实例修改了一下，结果报错，代码如下：
class Person
attr_accessor :name ,:age ,:sex1
def say_hello
puts "#{self.name}"
end
end
class Man < Person
def say_sex1
puts "i sex is #{self.sex1}"
super
say_hello
end
end
man = Man.new
man.name="zhangsan"
#man.age= 20
man.sex1 = "Nan"
man.say_sex1
错误：
D:/rubytest/3.14:18:in `say_sex1': super: no superclass method `say_sex1' for #<Man:0x290a420 @name="zhangsan", @age=20, @sex1="Nan"> (NoMethodError)
from D:/rubytest/3.14:31:in `<main>'
i sex is Nan
[Finished in 0.1s with exit code 1]
为什么名字输出不了？
我是参考这个成功的例子的理解改的，但怎么这个例子就 OK 呢？那我必须怎么修改？ class Person attr_accessor :name ,:age,:sex1 def say_hello puts "#{self.name}" end
def say_abge puts "#{self.age}" end end class Man < Person # def sex # return "Nan" # end
def say_sex1 puts "i sex is #{self.sex1}" end def say_hello super say_abge say_sex1 end end man = Man.new man.name="zhangsan" man.age= 30 man.sex1 = "nv" man.say_hello
我改成这样也还是不行。 class Person attr_accessor :name ,:sex1 def say_hello puts "#{self.name}" end end class Man < Person def say_sex1 puts "i sex is #{self.sex1}" def say_hello super say_sex1 end end end man = Man.new man.name="zhangsan" #man.age= 20 man.sex1 = "Nan" man.say_hello