c#中实现控制台日历

using System;
using System.Collections.Generic;
class Test
{
    public static void Main(String[] args)
    {
        while (true)
        {
            int year, month;//分别声明接收用户输入年月的变量
            while (true)
            {
                Console.Write("请输入年份（1900-2100）：");
                year = int.Parse(Console.ReadLine());
                if (year < 1900 || year > 2100)
                {
                    Console.Write("输入的年份不在1900-2100之间，请按会车键重新输入！");
                    Console.ReadLine();
                    Console.Clear();
                }
                else
                {
                    Console.Write("请输入月份（1-12）：");
                    month = int.Parse(Console.ReadLine());
                    if (month < 1 || month > 12)
                    {
                        Console.Write("输入的月份不在1-12之间，请按回车键重新输入！");
                        Console.ReadLine();
                        Console.Clear();
                    }
                    else
                        break;
                }
            }

            List<string> dataes = new List<string>();
            //分别声明用户输入的年月与已知1900年1月1日相隔的整年天数和月份天数
            int crossDayToYear = 0, crossDayToMonth = 0;
            //1900年到year-1年相隔的天数
            for (int i = 1900; i < year; i++)
            {
                if (i % 4 == 0 && i % 100 != 0 || i % 400 == 0)
                    crossDayToYear += 366;
                else
                    crossDayToYear += 365;
            }

            for (int i = 1; i < month; i++)
            {
                if (i == 2)
                {
                    if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
                        crossDayToMonth += 29;
                    else
                        crossDayToMonth += 28;
                }
                else if (i <= 7 && i % 2 != 0 || i > 7 && i % 2 == 0)
                    crossDayToMonth += 31;
                else
                    crossDayToMonth += 30;
            }
            int crossDay = crossDayToYear + crossDayToMonth;//相隔的总天数
            int dayOfWeek = crossDay % 7 + 1;//用户输入的月份第一天是星期几
            int space = dayOfWeek - 1;
            for (int i = 0; i < space; i++)
            {
                dataes.Add("");
            }

            int days;//用户输入的月份的天数
            if (month == 2)
            {
                if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)
                    days = 29;
                else
                    days = 28;
            }
            else if (month <= 7 && month % 2 != 0 || month > 7 && month % 2 == 0)
                days = 31;
            else
                days = 30;
            for (int i = 1; i <= days; i++)
            {
                dataes.Add(i.ToString());
            }
            Console.WriteLine("******************************************************");
            Console.Write("一\t二\t三\t四\t五\t六\t日");
            for (int i = 0; i < dataes.Count; i++)
            {
                if (i % 7 == 0)
                    Console.WriteLine();
                Console.Write(dataes[i] + "\t");
            }
            Console.WriteLine();
            Console.WriteLine("******************************************************");
            Console.Write("按回车键继续");
            Console.ReadLine();
            Console.Clear();
        }
    }
}