C#: 枚举

枚举是用户定义的整数类型。在声明一个枚举时，要指定该枚举可以包含的一组可接受的实例值。

using System;

namespace ConsoleApplication3

{

classProgram

{

staticvoid Main(string[] args)

{

WriteGreeting(TimeOfDay.afternoon);

 

// 从字符串中获取枚举值，并转换为整数

TimeOfDay time2 = (TimeOfDay)Enum.Parse(typeof(TimeOfDay), "afternoon", true);

Console.WriteLine((int)time2);

Console.ReadLine();

}

staticvoid WriteGreeting(TimeOfDay timeOfDay)

{

switch (timeOfDay)

{

caseTimeOfDay.morning:

Console.WriteLine("Good morning!");

break;

caseTimeOfDay.afternoon:

Console.WriteLine("Good afternoon!");

break;

caseTimeOfDay.evening:

Console.WriteLine("Good evening!");

break;

default:

Console.WriteLine("Hello!");

break;

}

}

publicenumTimeOfDay

{

morning=0,

afternoon=1,

evening=2

}

}

}