C#复习题

C#复习：
题：
添加5个学生的信息到集合中，
每个学生都有：学号，姓名，成绩，3个内容，
添加完毕后将学生的分数从高到低排列并打印出来

在其他类中定义一组变量


class student
    {
        public string code;
        public string name;
        public decimal score;
    }

 ArrayList ary = new ArrayList();
            for (int i = 1; i < 6; i++)
            {
                student s = new student();
                Console.Write("请输入第" + i + "个学生的学号：");
                s.code = Console.ReadLine();
                Console.Write("请输入第" + i + "个学生的名字：");
                s.name = Console.ReadLine();
                Console.Write("请输入第" + i + "个学生的成绩：");
                s.score = decimal.Parse(Console.ReadLine());
                ary.Add(s);
                Console.WriteLine("-----------------------------------------------------");
                Console.Write(s.score);
            }
            for (int i = 0; i < ary.Count; i++)
            {
                for (int l = i + 1; l < ary.Count; l++)
                {
                    student s1 = (student)ary[i];
                    student s2 = (student)ary[l];
                    if (s1.score < s2.score)
                    {
                        object zhong = ary[i];
                        ary[i] = ary[l];
                        ary[l] = zhong;
                    }
                }
            }
            foreach(object o in ary)
            {
                student oo = (student)o;
                Console.WriteLine(oo.code+"\t"+oo.name+"\t"+oo.score);
            }