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A complete listing of the C# program discussed in this module is provided in Listing 4 .
Listing 4 . The program named Airship01.
/*Project Airship01
* Illustrates inheritance* ******************************************************/
using System;namespace Airship01 {
//Define a class to exercise the Balloon class and the// Airplane class.
class Driver {static void Main(string[] args) {Balloon balloon = new Balloon();
balloon.range = 5;balloon.altitude = 500;
balloon.passengerCapacity = 5;balloon.liftMedia = "Hot Air";
Console.WriteLine("Balloon");Console.WriteLine(
"range = " + balloon.range + " miles");Console.WriteLine(
"altitude = " + balloon.altitude + " feet");Console.WriteLine("passenger capacity = "
+ balloon.passengerCapacity);Console.WriteLine("lift media = "
+ balloon.liftMedia);Airplane airplane = new Airplane();
airplane.range = 5000;airplane.altitude = 35000;
airplane.cargoCapacity = 20000;airplane.engineType = "jet";
Console.WriteLine("");//blank lineConsole.WriteLine("Airplane");
Console.WriteLine("range = " + airplane.range + " miles");
Console.WriteLine("altitude = " + airplane.altitude + " feet");
Console.WriteLine("cargo capacity = "+ airplane.cargoCapacity + " pounds");
Console.WriteLine("engine type = "+ airplane.engineType);
//Pause and wait for the user to press any key.Console.ReadKey();
}//end Main}//end class Driver
//====================================================////Define common properties in the base class.
class Airship {private int rangeData = 0;
private int altitudeData = 0;public int range {
get {return rangeData;
}//end getset {
rangeData = value;}//end set
}//end range propertypublic int altitude {
get {return altitudeData;
}//end getset {
altitudeData = value;}//end set
}//end altitude property}//end class Airship
//====================================================////Define unique properties in the subclass.
class Balloon : Airship {private int passengerCapacityData;
private String liftMediaData;public int passengerCapacity {
get {return passengerCapacityData;
}//end getset {
passengerCapacityData = value;}//end set
}//end passengerCapacity propertypublic String liftMedia {
get {return liftMediaData;
}//end getset {
liftMediaData = value;}//end set
}//end liftMedia property}//end Balloon class
//====================================================////Define unique properties in the subclass.
class Airplane : Airship {private int cargoCapacityData;
private String engineTypeData;public int cargoCapacity {
get {return cargoCapacityData;
}//end getset {
cargoCapacityData = value;}//end set
}//end cargoCapacity propertypublic String engineType {
get {return engineTypeData;
}//end getset {
engineTypeData = value;}//end set
}//end engineType property}//end Airplane class
//====================================================//}//end namespace Airship01 -end-
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