Can a non-const object call a const function?

Const member functions in C++ A const member function can be called by any type of object. Non-const functions can be called by non-const objects only.

How is it possible to have both const and non-const version of a function?

You need to use the const member function to have the logic and have the non-const member function call the const member function and re-cast the return value to a non-const reference (or pointer if the functions returns a pointer):

Can a function have both the const and non-const version in the same program?

A function can have both the const and non-const version in the same program. Explanation: The functions in a program can be made both const and non-const. This feature is made available to make programming more flexible. This ensures the security too as we can call const function whenever required.

When the object is a const object only const member functions can be used?

Const member functions in C++ Like member functions and member function arguments, the objects of a class can also be declared as const. an object declared as const cannot be modified and hence, can invoke only const member functions as these functions ensure not to modify the object.

Should C++ getters be const?

So, in general, getters can be const as they don’t change the object’s state. Setters should not be const .

When you create an object of a class A like a obj then which one will be called automatically?

Explanation: Constructors are the member functions which are called automatically whenever an object is created. It is a mandatory functions to be called for an object to be created as this helps in initializing the object to a legal initial value for the class.

What is static member function?

The static member functions are special functions used to access the static data members or other static member functions. A static member function shares the single copy of the member function to any number of the class’ objects. We can access the static member function using the class name or class’ objects.

What are constant data members?

Data members of a class may be declared as const . Such a data member must be initialized by the constructor using an initialization list. Once initialized, a const data member may never be modified, not even in the constructor or destructor.