What is the difference between virtual and pure virtual functions?
An example of an AI chatbot conversation about virtual and pure virtual functions in programming.
Can you explain the difference between virtual and pure virtual functions?
Sure! A virtual function is a function in a base class that you expect to override in derived classes. It has an implementation in the base class.
What about pure virtual functions?
A pure virtual function is a virtual function that has no implementation in the base class. It is declared by assigning 0 in its declaration, making the class abstract.
Why would I use pure virtual functions?
You use pure virtual functions to create an interface that must be implemented by derived classes, enforcing a contract.
Can you give me an example of both?
Certainly! In C++, a virtual function might look like virtual void display(); while a pure virtual function would be virtual void display() = 0;.
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