using System;

// 定义枚举类型
public enum DaysOfWeek
{
    Sunday,    // 默认从0开始，依次递增
    Monday,
    Tuesday,
    Wednesday,
    Thursday,
    Friday,
    Saturday
}

class Program
{
    static void Main()
    {
        // 使用枚举常量
        DaysOfWeek today = DaysOfWeek.Wednesday;
        Console.WriteLine("Today is: " + today);

        // 将枚举转换为整数
        int dayValue = (int)today;
        Console.WriteLine("Day value: " + dayValue);

        // 使用枚举在 switch 语句中
        switch (today)
        {
            case DaysOfWeek.Sunday:
                Console.WriteLine("It's a relaxing day!");
                break;
            case DaysOfWeek.Monday:
            case DaysOfWeek.Wednesday:
                Console.WriteLine("It's a working day.");
                break;
            case DaysOfWeek.Friday:
                Console.WriteLine("Weekend is almost here!");
                break;
            default:
                Console.WriteLine("It's a regular day.");
                break;
        }
    }
}