C# 抓鬮 練習，再不濟好歹是自已寫的，多練練吧，待改進

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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;            //檢測人數為數字            while (flag) {                try {                    Console.Write("請輸入要抓鬮的人數：");                    personNum = int.Parse(Console.ReadLine());                    flag = false;                }                catch {                    Console.WriteLine("輸入的非數字，請重新輸入");                }            }            person = new string[personNum];            //檢測姓名非空            for (int i = 0; i < personNum; i++) {                Console.Write("請輸入第{0}個人的姓名：", i + 1);                flag = true;                while (flag) {                    person[i] = Console.ReadLine();                    if (person[i] == "" || person[i] == null)                        Console.Write("未輸入姓名，請重新輸入第{0}個人的姓名:", i + 1);                    else                        flag = false;                }            }        }        public static void zhuajiu(string[] person, int personNum) {            Console.WriteLine("現在開始抓鬮...");            System.Random ran = new Random();            for (int i = 0; i < personNum; i++) {                //每次產生最大不超過當前數組長度的隨機數，數組長度每次減1;                int ranNow = ran.Next(personNum - i);                Console.WriteLine("第{0}次的抓鬮結果是：{1}", i + 1, person[ranNow]);                //每次把數組長度減1;                delPerson(ref person, ranNow);            }        }        public static void delPerson(ref string[] person, int ranNow) {            string[] tempPerson = new string[person.Length - 1];            //在獲得的隨機數之後，均往前挪一位;            for (int i = ranNow; i < (person.Length - 1); i++) {                person[i] = person[i + 1];            }            //每次把數組長度減1;            for (int j = 0; j < person.Length - 1; j++) {                tempPerson[j] = person[j];            }            person = tempPerson;        }    }}