851 B
Abstract Classes (#3)
The starter code contains an abstract class Instrument that contains an
abstract member function play(n: Note). Note is defined as an enum with
values A-G.
The classes Wind, Percussion and Stringed all inherit Instrument,
overriding play() in each case so it returns a String containing the class
name, then blow for Wind, strike for Percussion, and pluck for
Stringed, and finally the Note being played.
Add two constructor arguments to Instrument: name and action, and pass
the corresponding values in the subclasses. Make name and action val
properties and provide an implementation of play() in the superclass so that
it returns the same value that was previously produced by the play() in each
subclass. Remove implementations of play() from the subclasses.