C#-计算年份的天干地支和生肖

using System;
namespace ConsoleApp2
{
    class Program
    {
        public static readonly string[] _celestialStem = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
        public static readonly string[] _terrestrialBranch = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };
        public static readonly string[] _chineseZodiac = { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };
        static void Main(string[] args)
        {
            Console.Write("请输入要计算天干地支和生肖的年份： ");
            string str = Console.ReadLine();
            while (!string.IsNullOrEmpty(str))
            {
                int.TryParse(str, out int year);
                int tg = ((year - 3) % 10) - 1 < 0 ? 9 : ((year - 3) % 10) - 1;
                int dz = ((year - 3) % 12) - 1 < 0 ? 11 : ((year - 3) % 12) - 1;
                int sx = ((year - 3) % 12) - 1 < 0 ? 11 : ((year - 3) % 12) - 1;
                Console.WriteLine($"{_celestialStem[tg]}{_terrestrialBranch[dz]}{_chineseZodiac[sx]}");
                Console.WriteLine();
                Console.Write("请输入要计算天干地支和生肖的年份： ");
                str = Console.ReadLine();
            }
        }
    }
}