Console.WriteLine ("月");

string month = Console.ReadLine ();

Console.WriteLine ("日");

int day = int.Parse (Console.ReadLine ());

switch (month) {

case "1":

//摩羯座 水瓶座

if (day >= 1 && day <= 19) {

Console.WriteLine ("摩羯座");

} else if (day >= 20 && day <= 31) {

Console.WriteLine ("水瓶座");

} else {

Console.WriteLine ("輸入日期有誤！");

}

break;

case "2":

break;

default:

break;

}