C# 枚举

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);
        Console.WriteLine("Fri = {0}", y);
    }
}