//任意输入星期几的一个字母来判断一下是星期几，如不能判断，则再继续输入下一个字母，如再不能，

<pre name="code" class="csharp">using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
//任意输入星期几的一个字母来判断一下是星期几，如不能判断，则再继续输入下一个字母，如再不能，
//再输入下一个字母，直到能判断出为止，并统计到能判断时输入的字母的个数
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            char[] week1 = new char[10];//字符数组
            int i = 0;
            Console.WriteLine("此程序只需输入一个或者两个字母就可判断是星期几");
            Console.Write("请输入第一个大写字母：");
            week1[i] = Convert.ToChar(Console.ReadLine());

            switch (week1[i])
            {
                case 'M': Console.Write("Monday\n"); break;
                case 'W': Console.Write("Wednesday\n"); break;
                case 'F': Console.Write("Friday\n"); break;

                case 'S': Console.Write("请输入第二个小写字母：");
                    week1[i + 1] = Convert.ToChar(Console.ReadLine());
                    if (week1[i + 1] == 'a')
                        Console.Write("Saturday\n");
                    else if (week1[i + 1] == 'u')
                        Console.Write("Sunday\n");
                    else
                        Console.Write("没有答案\n");
                    break;
                case 'T': Console.Write("请输入第二个小写字母：");
                    week1[i + 1] = Convert.ToChar(Console.ReadLine());
                    if (week1[i + 1] == 'u')
                        Console.Write("Tuesday\n");
                    else if (week1[i + 1] == 'h')
                        Console.Write("Thursday\n");
                    else
                        Console.Write("没有答案\n");
                    break;
                default: Console.Write("没有答案\n"); break;

            }
            Console.Read();
        }
    }
}

c#编程：任意输入星期几的一个字母来判断一下是星期几