static void Main(string[] args) { /* * create People Airplane */ PeopleAirplane PeopleAirplane1 = new PeopleAirplane("ABC123", 60, 20, false, 234.0); PeopleAirplane PeopleAirplane2 = new PeopleAirplane("DDD888", 70, 30, false, 555.0); /* * Create Cargo Airplane */ CargoPlane cargoPlane1 = new CargoPlane("FF2134", false, 345.7, 2000, 1000); CargoPlane cargoPlane2 = new CargoPlane("PLA166", false, 400, 4000, 2000); /* * Add the airplanes to a list */ IList <Airplane> Airplanes = new List <Airplane>(); Airplanes.Add(PeopleAirplane1); Airplanes.Add(PeopleAirplane2); Airplanes.Add(cargoPlane1); Airplanes.Add(cargoPlane2); /* * create an airport and add a list of airplanes to it */ Airport Airport1 = new Airport("Endhoven", Airplanes); /* * Print all the data of the airport */ Console.WriteLine("\n********************************************"); Airport1.PrintAirplanes(); Console.WriteLine("\n********************************************"); Console.WriteLine("\n\t People Airplane Operations"); //Load passengers PeopleAirplane1.Load(30); // ask for landing while it is on the ground PeopleAirplane1.lands(); // the plane takeoff PeopleAirplane1.TakeOff(); // try to unload the passenngers while it is flying PeopleAirplane1.Unload(); // the plane lands PeopleAirplane1.lands(); // the plane unload the passengers PeopleAirplane1.Unload(); /* * Operations on the cargo airplane */ Console.WriteLine("\n********************************************"); Console.WriteLine("\n\t Cargo Airplane Operations"); cargoPlane1.lands(); cargoPlane1.Load(3000); cargoPlane1.TakeOff(); cargoPlane1.Unload(); Console.WriteLine("\n\t**************************************************"); /* * Requesting passengers airplane are not flying and has room for passengers */ var AvailableAirplanes = Airport1.ReturnAvailableAirplanes(); try { foreach (var Plane in AvailableAirplanes) { Console.WriteLine($"\n\tPlane {Plane.Identification} requested.Is not flying, still room for {((PeopleAirplane)(Plane)).MaxOfPassengers - ((PeopleAirplane)Plane).CurrentNoOfPassengers} passengers."); } }catch (NullReferenceException ex) { Console.WriteLine(ex.Message); }catch (Exception ex) { Console.WriteLine(ex.Message); } }