devxlogo

When to Use a Pure Virtual Member Function

When to Use a Pure Virtual Member Function

A pure virtual function is merely an interface and can be thought of as a way to enforce policy. A pure virtual function should be used when subclasses implement the same interface completely differently. For example, a persistence interface can have a write operation to store the state of an object. Yet, each class that implements this interface performs individual operations to store its state into a file:

 class persistent {public:  virtual void Write () = 0;};class Clock: public persistent { public:  void Write() {_} // implement the interface};class Date: public persistent {public:  void Write() {_} // implement the interface};
See also  lenso.ai - an AI reverse image search platform
devxblackblue

About Our Editorial Process

At DevX, we’re dedicated to tech entrepreneurship. Our team closely follows industry shifts, new products, AI breakthroughs, technology trends, and funding announcements. Articles undergo thorough editing to ensure accuracy and clarity, reflecting DevX’s style and supporting entrepreneurs in the tech sphere.

See our full editorial policy.

About Our Journalist