/**
* Returns a new DateTime representing the arrival time by adding the duration
* and delay to the departure DateTime. Calls polymorphic function GetDelay for
* appropriate derived class.
*/
DateTime FlightNode::GetArrivalTime() {
DateTime arrival = DateTime(departure_.minutes(), departure_.hours(),
departure_.day(), departure_.month(),
departure_.year());
int min = duration_ + GetDelay();
arrival.AddMinutes(min);
return arrival;
}
