using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace ConsoleApplication1{    class Program    {        static void Main(string[] args)        {           Console.Write("请输入数字0—6");            int a = int.Parse(Console.ReadLine());            switch (a)            {                case 0:                    Console.WriteLine("星期天");                    break;                case 1:                    Console.WriteLine("星期1");                    break;                case 2:                    Console.WriteLine("星期2");                    break;                case 3:                    Console.WriteLine("星期3");                    break;                case 4:                    Console.WriteLine("星期4");                    break;                case 5:                    Console.WriteLine("星期5");                    break;                case 6:                    Console.WriteLine("星期6");                    break;                default:                    Console.WriteLine("数字不正确");                    break;            }            Console.ReadLine();        }    }}