宿舍值日源码（太简洁）

using System;
public class OnDuty
{
public static void Main()
{
int today;
        do
{
Console.WriteLine ("Please input what day it is today:\n\n1 2 3 4 5 6 7 will be ok.and -1 is quit");
today=int.Parse (Console.ReadLine ());
switch(today)
{
case 1:
Console.WriteLine ("\nA is on duty today.He must make our room cleanly.");
break;
case 2:
Console.WriteLine ("\nB is on duty today.He msut make our room cleanly.");
break;
case 3:
Console.WriteLine ("\nC is on duty today.He msut make our room cleanly.");
break;
case 4:
Console.WriteLine ("\nD is on duty today.He must make our room cleanly.");
break;
case 5:
Console.WriteLine ("\nE is on duty today.He msut make our room cleanly.");
break;
case 6:
Console.WriteLine ("\nF is on duty today.He must make our room cleanly.");
break;