In software design, you should plan ahead the interface of a class hierarchy to make sure that all related concrete classes share a common interface. This can be achieved by using abstract classes. An abstract class is one having at least one pure virtual member function, i.e., a non-implemented placeholder, which must be implemented by its derived class(es). Mind that instances of an abstract class cannot be created, since it

4 Areas of Your Company Where Your Audio Really Matters
Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a