Ruby 学校，班级，学生类的三级关系

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#!/usr/bin/ruby -w
# -*- coding: UTF-8 -*-
# 学生类
class Student
  attr_accessor :age, :name
  def initialize(name, age)
    @name, @age = name, age
  end
end
# 班级类
class Class
  attr_accessor :students, :class_name
  def initialize(class_name)
    @class_name=class_name
    @students=[]
  end
end
# 学校类
class School
  attr_accessor :classes, :school_name
  def initialize(school_name)
    @school_name=school_name
    @classes=[]
  end
end

school=School.new("XXX大学")
for i in 0..10
  school.classes.push(Class.new("班级"+i.to_s))
  for j in 0..30
    school.classes[i].students.push(Student.new("学生"+j.to_s,10+j))
  end
end
puts school.school_name
for i in 0..10
  puts school.classes[i].class_name
  for j in 0..30
    puts "学生："+school.classes[i].students[j].name+" age ："+school.classes[i].students[j].age.to_s
  end
end