Can template class be inherited?

Question

A class that has a template specifications in it can it be inherited?

Answer 1

Yes.

template <class T>
class Base {...};

class Derived: public Base <Derived> {...};

See CRTP idiom for example.

Answer 2

please what does CRTP means ?

Answer 3

Curiously Recurring Template Pattern aka Mixin from above. Used as static polymorphism and to mix in the behavior or data into a derived class. See Wikipedia or DuckDuckGo for the more information