Can pure virtual function have default argument?

Can pure virtual function have default argument?

Yes, C++ virtual functions can have default parameters.

Do you have to override pure virtual functions?

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.

What are the advantages of having default arguments in any function?

provides a simple, natural and effective programming style; in some cases, the default arguments are a shortened form of the function overload. This, in turn, improves the readability of the program code and simplifies the function call.

Does an overriding function in a derived class acquire default arguments from the function it overrides?

A virtual function call (10.3) uses the default arguments in the declaration of the virtual function determined by the static type of the pointer or reference denoting the object. An overriding function in a derived class does not acquire default arguments from the function it overrides.

Can a pure virtual function have an implementation?

A pure virtual function (or abstract function) in C++ is a virtual function for which we can have implementation, But we must override that function in the derived class, otherwise the derived class will also become abstract class (For more info about where we provide implementation for such functions refer to this …

What is a pure virtual function in C++?

A pure virtual function is a virtual function in C++ for which we need not to write any function definition and only we have to declare it. It is declared by assigning 0 in the declaration. If an Abstract Class has derived class, they must implement all pure virtual functions, or else they will become Abstract too.

Can you instantiate a class with pure virtual function?

A class having a pure virtual function cannot be instantiated i.e the object of abstract classes cannot be created. However, a pointer to the abstract base class or abstract class can be created.

Can a virtual function have default parameters in C + +?

If you call through a base class object, pointer or reference, the default denoted in the base class is used. Conversely, if you call through a derived class object, pointer or reference the defaults denoted in the derived class are used. There is an example below the Standard quotation that demonstrates this.

Can a function have default arguments in a derived class?

An overriding function in a derived class does not acquire default arguments from the function it overrides. Example: Here is a sample program to demonstrate what defaults are picked up.

What’s the difference between a virtual function and a static function?

This is a bad idea, because the default arguments you get will depend on the static type of the object, whereas the virtual function dispatched to will depend on the dynamic type.

Is there any point in adding override at the end of derived?

However, in the case of a pure virtual function, the compiler would throw an error if we used an incorrect signature in the Derived class (or Base class, depending on how one see things). So, is there any point in adding override at the end of Derived::my_function () declaration?