using System;

public class Program

{

    public static void Main()

    {

        string choice;

        //string[,] name = new string[3,2];

        //name[0,0]="周子瑜"; name[0,1]="李玉璽";

        //name[1,0]="李榮號"; name[1,1]="郭採擷";

        //name[2,0]="林志玲"; name[2,1]="金敏駿";

        string[,] name = new string[5,3]

        {

            {"周子瑜","李玉璽","周興哲"},

            {"李榮號","郭採擷","王建民"},

            {"林志玲","金敏駿","郭泓志"},

            {"林俊傑","周杰倫","林書豪"},

            {"呆火鱷","潤水鴨","新葉喵"}

        };

        do

        {

            Console.WriteLine("##########");

            Console.WriteLine("銘傳點名系統");

            Console.WriteLine("**********");

            Console.WriteLine("      第一個  第二個  第三個");

            int i,j,x,y;

            for (i=0; i<5; i++)

            {

                Console.Write("第"+(i+1)+"排");

                for (j=0; j<3; j++)

                {

                    Console.Write("  ");

                    Console.Write(name[i,j]);

                }

                    Console.WriteLine();

            }

            Console.WriteLine();

            Console.WriteLine("請輸入：");

            Console.WriteLine("點名請按a，按q離開");

            choice = Console.ReadLine();

            if (choice == "a")

            {

                //Console.WriteLine("開始點名");

                Console.WriteLine();

                string password;

                Console.Write("請輸入管理密碼：");

                password = Console.ReadLine();

                if(!(password == "xx123"))

                {

                    Console.WriteLine();

                    Console.WriteLine("密碼錯誤");

                    break;

                }

                Console.WriteLine("缺席者座第幾排?");

                x = Convert.ToInt16(Console.ReadLine());

                Console.WriteLine("缺席者座第幾個");

                y = Convert.ToInt16(Console.ReadLine());

                //name[x-1, y-1] = "*缺席*";

                if ((x>=1) && (x<=5) && (y>=1) && (y<=3))

                {

                    name[x-1, y-1] = "*缺席*";

                }

                else

                {

                    Console.WriteLine();

                    Console.WriteLine("查無此人");

                    Console.WriteLine();

                    //break;

                }

            }

        }while (choice !="q");

        Console.WriteLine("再見");

    }

}