namespace ConsoleApplication3
{
    public enum qqState
    {
        qqonline,
        qqoffline,
        qqme,
        qqbusy,
    }
    public struct Person
    {
        public string _name;
        public int _age;
        public Gender _gender;
    }
    public enum Gender
    {
        男,
        女
    }

    class Program
    {
        //可变参数 params 在方法的形参中是唯一 且在方法形参的最后一个
        public static void Sun(string name, params int[] arr)
        {
            int S = 0;
            for (int i = 0; i < arr.Length; i++)
            {
                S += arr[i];
            }
            Console.WriteLine("{0}和是：{1}",name,S);
        }
        static void Main(string[] args)
        {
            //#region
            //将enum 类型转换成int
            //枚举和int类型是相互兼容的 可以相互转换
            //int n = 0;
            //qqState qa;
            //n = (int)qqState.qqbusy;
            //Console.WriteLine(n);
            //#endregion
            //#region
            //将enum   转成int
            //枚举和int类型是相互兼容的 可以相互转换
            //qqState qb;
            //int m = 2;
            //qb = (qqState)m;
            //Console.WriteLine(qb);
            //#endregion
            //#region
            //将枚举类型转换string
            //qqState qc;
            //qc = qqState.qqoffline;
            //string str = qc.ToString();
            //Console.WriteLine(str);
            //#endregion
            //#region
            //将string转换成int
            //Console.WriteLine("将string转换成int");
            //qqState qd;
            //string s = "2";
            //qd = (qqState)Enum.Parse(typeof(qqState), s);
            //Console.WriteLine(qd);
            //是数字 如果枚举中没有就会输出数字 不会抛出异常
            //s = "5";
            //qd = (qqState)Enum.Parse(typeof(qqState), s);
            //Console.WriteLine(qd);
            //是数字 如果枚举中没有 就会抛出异常
            //s = "qqme";//s="sdf";//这样会报错
            //qd = (qqState)Enum.Parse(typeof(qqState), s);
            //Console.WriteLine(qd);
            ////#endregion

            int[] s = { 100, 230, 12 };
            Sun("sun1", 100, 230, 12);
            Sun("sun2", s);
            Person lsPerson;
            lsPerson._name = "SDE";

            Console.ReadKey();
        }
    }
}