Tag: The main difference between a pure virtual function and a virtual function is

A pure virtual function is a function that must be overridden in a derived class and need not be defined . A virtual function is declared to be “pure” using the curious =0 syntax. For example: class Base {

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You may call a virtual function as long as it is not a pure virtual function , and as long as you know that what you are calling is the method from the class itself and not expecting any polymorphism. Calling a pure virtual function from a constructor is undefined behaviour even if it has an implementation.

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