_14__enum___Weekday得到某日的下一日(星期几)

// 声明一个枚举类型Weekday，基类为int，访问范围为public    public enum Weekday    {        Sun, Mon, Tue, Wed, Thu, Fri, Sat    }

判断方法

// 功能： 得到某日的下一日(星期几)    // 参数：    //        wd : 枚举类型Weekday    // 返回值： 枚举类型Weekday    public static Weekday NextDay(Weekday wd)    {        Weekday wdnext;        if (wd == Weekday.Sat)        {            wdnext=Weekday.Sun;        }        else        {            wdnext=wd+1;        }        return wdnext;    }

主程序中：

 public static void Main()    {        // 用枚举类型Weekday声明变量并赋初值        Weekday wd1 = Weekday.Mon;        Console.WriteLine("每周的工作日从{0}开始",wd1);        Weekday wd2=Weekday.Fri;        Console.WriteLine("到{0}结束",wd2);                // 枚举类型变量用于计算        Console.WriteLine("每周有{0}个工作日", wd2-wd1);        Console.WriteLine();        // 枚举类型变量作为函数的参数        Console.WriteLine("Mon之后是{0}",NextDay(Weekday.Mon));        Console.WriteLine();                // 使用枚举类型的GetNames()方法        foreach(string s1 in Weekday.GetNames(typeof(Weekday)))        {            Console.Write(s1+" ");        }        Console.WriteLine("\n");                // 从命令行读取枚举类型变量的值        Console.Write("今天是星期几? ");        Weekday wd3=(Weekday)Weekday.Parse(typeof(Weekday),Console.ReadLine());        Console.WriteLine("明天是{0}",NextDay(wd3));        Console.WriteLine();                // 比较枚举类型的值        Console.Write("体育课在星期几? ");        wd1=(Weekday)Weekday.Parse(typeof(Weekday),Console.ReadLine());        Console.Write("物理试验在星期几? ");        wd2=(Weekday)Weekday.Parse(typeof(Weekday),Console.ReadLine());        if(wd1.CompareTo(wd2) == 0)        {            Console.WriteLine("糟糕，在同一天。");        }        else        {            Console.WriteLine("没事，不在同一天");        }    }