public void ShowMessage(object sender, Heater.BoiledEventArgs e)
{
var heater = (Heater)sender;
Console.WriteLine($"Display ({heater.area} - {heater.type}): 水快烧开了，当前温度 {e.temperature}℃ ");
}
public void MakeAlert(object sender, Heater.BoiledEventArgs e)
{
var heater = (Heater)sender;
Console.WriteLine($"Alarm ({heater.area} - {heater.type}): 滴滴滴，水已经 {e.temperature}℃ 了");
}