嗨，我是 Fly，用 Ruby 寫 Chatbot 並挑戰30天分享心得
為確保不會沒靈感
每日含 Ruby 解題增加內容
https://www.hackerrank.com/domains/tutorials/30-days-of-code

Day 12: Inheritance

• Use super to learn parent func
• average = @score.sum/@score.size

class Person
	def initialize(firstName, lastName, id)
		@firstName = firstName
		@lastName = lastName
		@id = id
	end
	def printPerson()
		print("Name: ",@lastName , ", " + @firstName ,"\nID: " , @id)
	end
end


class Student <Person
    def initialize(firstName, lastName, id, score)
      super(firstName, lastName, id)
      @score = score
    end

    def calculate
      total = @score.sum/@score.size
      if total < 101 && total > 89
        'O'
      elsif total < 90 && total > 79
        'E'
      elsif total < 80 && total > 69
        'A'
      elsif total < 70 && total > 54
        'P'
      elsif total < 55 && total > 40
        'D'
      else
        'T'
      end
    end
end


input = gets.split()
firstName = input[0]
lastName = input[1]
id = input[2].to_i
numScores = gets.to_i
scores = gets.strip().split().map!(&:to_i)
s = Student.new(firstName, lastName, id, scores)
s.printPerson           
print("\nGrade: " + s.calculate)