C#例题：输入学生学号，姓名，分数，然后根据分数进行排序。这个题是用集合和结构体来做，与上一题不同。掌握基础知识很重要

 class Program
    {
        struct student
        {
            public string name;
            public int code;
            public int age;
            public double fenshu;
                                                                                                                                                                                                                                                                                
        }

        static void Main(string[] args)
        {
            ArrayList al = new ArrayList();  //定义一个新的集合
            Console.Write("请输入人数：");
            int renshu = Convert.ToInt32(Console .ReadLine ());
            for (int i = 0; i <renshu; i++)
            {
                student r = new student();
                Console.Write("请输入第"+(i+1)+"个人的名字:");
                r.name = Console.ReadLine();

                Console.Write("请输入第" + (i + 1) + "个人的学号:");
                r.code = Convert.ToInt32(Console .ReadLine ());
                Console.Write("请输入第" + (i + 1) + "个人的年龄:");
                r.age = Convert.ToInt32(Console .ReadLine ());
                Console.Write("请输入第" + (i + 1) + "个人的分数:");
                r.fenshu = Convert.ToDouble(Console .ReadLine ());
                al.Add(r);                                            //把r的数据都放在al这个集合里
            }
                ; for (int i = 0; i < renshu ; i++)
                {
                    for (int j = i; j < renshu-1; j++)
                    
                        if (((student)al[i]).fenshu<((student )al[j+1]).fenshu)  //从student 结构体的集合里调出分数进行比较
                        {
                            student zhong;
                            zhong = (student )al[i];
                            al[i] = al[j + 1];
                            al[j+ 1] = zhong;
                        }
                    }
            Console .WriteLine ("排序后学生顺序:");
                for (int i = 0; i < renshu; i++)
                {
                    Console.WriteLine("名字	" + ((student)al[i]).name + "学号	" + ((student)al[i]).code + "年龄	" + ((student)al[i]).age
                        + "分数	" + ((student)al[i]).fenshu );
                   
                }
                Console.ReadLine();
                }
            }
        }