注意利用枚举和switch开关语句来进行实现

效果：

【实现过程】

  static void Main(string[] args)
            {
            Console.WriteLine("请输入星期：");
            Week week = (Week)byte.Parse(Console.ReadLine());
            string zero = "星期天的特价菜是：水煮鱼";
            string one = "星期一的特价菜是：爆炒牛肉";
            string two = "星期二的特价菜是：油焖大虾";
            string thr = "星期三的特价菜是：回锅肉";
            string foer = "星期四的特价菜是：啤酒鸭";
            string fir = "星期五的特价菜是：剁椒鱼头";
            string six = "星期六的特价菜是：羊肉火锅";

            switch (week)
                {
                case Week.sun:
                    Console.WriteLine(zero);
                    break;
                case Week.mon:
                    Console.WriteLine(one);
                    break;
                case Week.tue:
                    Console.WriteLine(two);
                    break;
                case Week.wed:
                    Console.WriteLine(thr);
                    break;
                case Week.thu:
                    Console.WriteLine(foer);
                    break;
                case Week.fri:
                    Console.WriteLine(fir);
                    break;
                case Week.sat:
                    Console.WriteLine(six);
                    break;
                default:
                    break;
                }

            }
        enum Week : byte
            {
            sun,
            mon,
            tue,
            wed,
            thu,
            fri,
            sat
            }