新人一枚，C#编程问题求解答

public enum QQstate
{
online=1,
offline,
leave,
busy,
qme,
}
static void Main(string[] args)
{
Console.WriteLine("选择一个状态\n1--online\n2--offline\n3--leave\n4--busy\n5--qme")
string input = Console.ReadLine();
switch (input)
{
case "1": QQstate s1 = (QQstate)Enum.Parse(typeof(QQstate), input);
Console.WriteLine("你选择的状态是{0}", s1);
break;
case "2": QQstate s2 = (QQstate)Enum.Parse(typeof(QQstate), input);
Console.WriteLine("你选择的状态是{0}", s2);
break;
case "3": QQstate s3 = (QQstate)Enum.Parse(typeof(QQstate), input);
Console.WriteLine("你选择的状态是{0}", s3);
break;
case "4": QQstate s4 = (QQstate)Enum.Parse(typeof(QQstate), input);
Console.WriteLine("你选择的状态是{0}", s4);
break;
case "5": QQstate s5 = (QQstate)Enum.Parse(typeof(QQstate), input);
Console.WriteLine("你选择的状态是{0}", s5);
break;
}
Console.ReadKey();
}
}
}