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                **枚舉是一組常量的集合** 枚舉列表中的每個符號代表一個整數值,一個比它前面的符號大的整數值。默認情況下,第一個枚舉符號的值是 0 ``` using System; public class EnumTest { enum Day { Sun, Mon, Tue, Wed, Thu, Fri, Sat }; static void Main() { int x = (int)Day.Sun; int y = (int)Day.Fri; Console.WriteLine("Sun = {0}", x);//Sun =0 Console.WriteLine("Sun = {0}", Day.Sun);//Sun =sun Console.WriteLine("Fri = {0}", y);//Sun =5 } } ``` 在C#中,枚舉可以包含自己的值,這意味著你可以為枚舉成員分配一個特定的值。 默認情況下,如果不為枚舉成員指定值,它們將按照順序從0開始自動分配值。例如,在下面的示例中: ~~~ csharpCopy Codeenum DaysOfWeek { Monday, // 值為0 Tuesday, // 值為1 Wednesday, // 值為2 Thursday, // 值為3 Friday, // 值為4 Saturday, // 值為5 Sunday // 值為6 } ~~~ 然而,你也可以為枚舉成員分配自定義的值。例如: ~~~ csharpCopy Codeenum DaysOfWeek { Monday = 1, Tuesday = 2, Wednesday = 3, Thursday = 4, Friday = 5, Saturday = 6, Sunday = 7 } ~~~
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