using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace 实验一

{

    class Program

    {

        static void Main(string[] args)

        {

            int i;

            Console.WriteLine("***********欢迎进入季节判断系统(气象划分法)***************");

            while (true)

            {

                Console.WriteLine("菜单：");

                Console.WriteLine("           1.1月    2.2月    3.3月           ");

                Console.WriteLine("           4.4月    5.5月    6.6月           ");

                Console.WriteLine("           7.7月    8.8月    9.9月           ");

                Console.WriteLine("           10.10月  11.11月  12.12月         ");

                Console.WriteLine("           13.退出                           ");

                Console.WriteLine("请输入月份序号：");

                i = int.Parse(Console.ReadLine());

                switch (i)

                {

                    case 3:

                    case 4:

                    case 5: Console.WriteLine("此月份在春季。。。"); break;

                    case 6:

                    case 7:

                    case 8: Console.WriteLine("此月份在夏季。。。"); break;

                    case 9:

                    case 10:

                    case 11: Console.WriteLine("此月份在秋季。。。"); break;

                    case 12:

                    case 1:

                    case 2: Console.WriteLine("此月份在冬季。。。"); break;

                    case 13: Console.WriteLine("退出成功，再见！！！"); break;

                    default: Console.WriteLine("输入错误！！！"); break;

                }//switch结束

                if (i == 13) break; //退出系统

            }//while结束

        }

    }

}