oops overriding

Question

create a base class telephone and derive a class electronicphone from it.in telephonecreate a protected string member phonetypeand a public method ring() that outputs a text message like this:ringing the :. in electronmicphone the constructor should set the phonetype to digital in the run () method  call ring() on the electronicphone to test the inheritance a) the derived class override the ring() method to display a different message b) change the telephone class to abstract and make ring() an abstract method . derive two new classes from telephone : digitalphone and talkingphone. each derived class should set the phonetype and override the ring() method.

Vithal Wadje · Answer

what help youits will be clearso always post question that other can understand

Vulpes · Answer

/* original program */ using System; class telephone { protected string phonetype; public void ring() { Console.WriteLine(ringing the {0} phone ... phonetype); } } class electronicphone : telephone { public electronicphone() { phonetype = digital; } public void run() { ring(); } } class Test { static void Main() { electronicphone ep = new electronicphone(); ep.run(); Console.ReadKey(); } } /* as amended by (a) */ using System; class telephone { protected string phonetype; public virtual void ring() { Console.WriteLine(ringing the {0} ... phonetype); } } class electronicphone : telephone { public electronicphone() { phonetype = digital; } public void run() { ring(); } public override void ring() { Console.WriteLine(the {0} phone is using a different ring-tone ... phonetype); } } class Test { static void Main() { electronicphone ep = new electronicphone(); ep.run(); Console.ReadKey(); } } /* as amended by (b) */ using System; abstract class telephone { protected string phonetype; public abstract void ring(); } class digitalphone : telephone { public digitalphone() { phonetype = digital; } public override void ring() { Console.WriteLine(ringing the {0} phone ... phonetype); } public void run() { ring(); } } class talkingphone : telephone { public talkingphone() { phonetype = talking; } public override void ring() { Console.WriteLine(ringing the {0} phone ... phonetype); } public void run() { ring(); } } class Test { static void Main() { digitalphone dp = new digitalphone(); dp.run(); talkingphone tp = new talkingphone(); tp.run(); Console.ReadKey(); } }