public static void setTime(timeDelegate td, int t)
{
for (int i = t; i >= 0; i--)
{
Thread.Sleep(1000);
Console.WriteLine(i);
}
td();
}
static void Main(string[] args)
{
timeDelegate td = new timeDelegate(up);
Console.WriteLine("请输入倒计时秒数，敲回车开始计时");
int t = int.Parse(Console.ReadLine());
setTime(td, t);
Console.ReadKey();
}
