類和實例

Question

我想解決https://www.hackerrank.com/challenges/30-class-vs-instance但我得到一個錯誤。 我的代碼工作，只有當intialAge小於0

* solution.rb：13：amIOld': undefined method <'的零：NilClass（NoMethodError）

class Person 
    attr_accessor :age 
    def initialize(initialAge) 
    if initialAge < 0 
     puts "Age is not valid, setting age to 0." 
     age = 0 
    else 
     initialAge = age 
    end 
    age 
    end 
    def amIOld() 
    if age < 13 
     puts "You are young." 
    elsif age.between?(13, 18) 
     puts "You are a teenager." 
    else 
     puts "You are old." 
    end 
    end 
    def yearPasses() 
    age += 1 
    end 
end 

Answer 1

答案是：

class Person attr_accessor :age def initialize(initialAge) @age = 0 if initialAge < 0 puts "Age is not valid, setting age to 0." @age = 0 else @age = initialAge end end def amIOld() if @age < 13 puts "You are young." elsif @age.between?(12, 17) puts "You are a teenager." else puts "You are old." end end def yearPasses() @age += 1 end end