Exercises 2–4 build on the code of each previous exercise.
|1:||Write four classes called ElectronicDevice, Radio, Computer, and MobilePhone. Let ElectronicDevice be the base class for the other three classes and include the following three class members in its definition:
Also include two methods called SwitchOn (which must write “On” and set isOn to true) and SwitchOff (which must write “Off” and set isOn to false). The three subclasses remain empty for now.
Write the appropriate code to test that even though the three subclasses have empty definitions, you ...