C# 抓阄 练习，再不济好歹是自已写的，多练练吧，待改进

using System;
namespace ZhuaJiu {
    class ZhuaJiu {
        public static void Main() {
            string[] person;
            int personNum;
            initPerson(out person, out personNum);
            zhuajiu(person, personNum);
            Console.ReadKey();
        }
        public static void initPerson(out string[] person, out int personNum) {
            bool flag = true;
            personNum = 0;
            //检测人数为数字
            while (flag) {
                try {
                    Console.Write("请输入要抓阄的人数：");
                    personNum = int.Parse(Console.ReadLine());
                    flag = false;
                }
                catch {
                    Console.WriteLine("输入的非数字，请重新输入");
                }
            }
            person = new string[personNum];
            //检测姓名非空
            for (int i = 0; i < personNum; i++) {
                Console.Write("请输入第{0}个人的姓名：", i + 1);
                flag = true;
                while (flag) {
                    person[i] = Console.ReadLine();
                    if (person[i] == "" || person[i] == null)
                        Console.Write("未输入姓名，请重新输入第{0}个人的姓名:", i + 1);
                    else
                        flag = false;
                }
            }
        }
        public static void zhuajiu(string[] person, int personNum) {
            Console.WriteLine("现在开始抓阄...");
            System.Random ran = new Random();
            for (int i = 0; i < personNum; i++) {
                //每次生成最大不超过当前数组长度的随机数，数组长度每次减1;
                int ranNow = ran.Next(personNum - i);
                Console.WriteLine("第{0}次的抓阄结果是：{1}", i + 1, person[ranNow]);
                //每次把数组长度减1;
                delPerson(ref person, ranNow);
            }

        }
        public static void delPerson(ref string[] person, int ranNow) {
            string[] tempPerson = new string[person.Length - 1];
            //在获得的随机数之后，均往前挪一位;
            for (int i = ranNow; i < (person.Length - 1); i++) {
                person[i] = person[i + 1];
            }
            //每次把数组长度减1;
            for (int j = 0; j < person.Length - 1; j++) {
                tempPerson[j] = person[j];
            }
            person = tempPerson;
        }
    }
}