using System;

public class Program

{

    public static void Main()

    {

        string choice;

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

        {

            {"周子瑜","李玉璽","周杰倫"},

            {"李榮浩","郭采潔","林心如"},

            {"林志玲","金敏俊","郭雪芙"},

            {"林俊傑","郭碧婷","王大陸"},

            {"周心誼","陳逸甯","許博淵"}

​

        };

        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...(點名後請按a，按q離開)");

        choice=Console.ReadLine();

        if (choice=="a")

        {

            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.Write("缺席者坐第幾排?");

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

            Console.Write("缺席者坐第幾個?");

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

            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();

            }

        }

        Console.WriteLine();

        }while(choice!="q");

        Console.WriteLine("再見");

    }

}