當值不同時，我如何在映射響應上使用開關響應？

Question

我一直在嘗試在映射的響應上使用switch語句來確定它是一週中的哪一天。根據響應，向用戶寫入一個字符串。例如，對於星期一，寫.Monday是第一個工作日。對於星期二，寫。星期二是第二個工作日。等等。

我曾嘗試如下所述和C＃不允許使用或||操作員可以幫助我嗎？

using System; 

enum WeekDay { Sunday = 0, Monday = 1, Tuesday, Thursday, Friday, Saturday }; 

static void Main(string[] args) 
{ 
    { 
     Console.WriteLine("What day is today"); 
     String strday = Console.ReadLine(); 

     WeekDay Result = WeekDay.Sunday; 
     WeekDay Result1 = WeekDay.Monday; 
     WeekDay Result2 = WeekDay.Tuesday; 

     switch (Result) 
     { 
      case WeekDay.Sunday: 
      Console.WriteLine("Sunday is a first day"); 
      break; 
     } 

     switch (Result1) 
     { 
      case WeekDay.Monday: 
      Console.WriteLine("Monday is a second day"); 
      break; 
     } 

     Console.ReadLine(); 
    } 
} 

}

Answer 1

這是因爲你的開關的語法是有點過。你是100％正確的，交換機不允許& &或||操作。我想你會想要這樣的事情：

DateTime curDate = DateTime.Now; 

    switch(curDate.DayofWeek) //day of week is an enum, you can .ToString() it to compare against "Monday", "Tuesday", etc... or leave it as an INT, your call. 
    { 
     case (1): 
      Console.WriteLine("Sunday is first day") 
      break; 
     case (2): 
      Console.WriteLine("Monday is second day") 
      break; 
     etc... 
    }