switch和try-catch综合练习

       
　　　　//输入任意年份,月份,判断该月份天数;
　　　　 static void Main(string[] args)
        {
            int intDay = 0;
            int intYear = 0;
            int intMonth = 0;
            //任意输入年份和月份, 判断该月有几天;
            try
            {
                Console.WriteLine("input your year:");
                intYear = Convert.ToInt32(Console.ReadLine());
                try
                {
                    Console.WriteLine("input your month:");
                    intMonth = Convert.ToInt32(Console.ReadLine());
                    if (intMonth>=1 && intMonth<=12)
                    {
                        switch (intMonth)
                        {
                            case 1:
                            case 3:
                            case 5:
                            case 7:
                            case 8:
                            case 10:
                            case 12: intDay = 31; break;
                            case 2:
                                if (intYear % 400 == 0 || (intYear % 4 == 0 && intYear % 100 != 0))
                                {
                                    intDay = 28;
                                }
                                else
                                {
                                    intDay = 29;
                                }
                                break;
                            default:
                                intDay = 30;
                                break;
                        }
                        Console.WriteLine(intDay);
                    }
                    else
                    {
                        Console.WriteLine("输入月份必须在1-12之间!");
                    }

                }
                catch
                {
                    Console.WriteLine("输入的月份有误, 程序退出!");
                }
            }
            catch
            {
                Console.WriteLine("输入年份有误, 退出程序!");
            }
            Console.ReadKey();

        }

    }