What is global friend function in C++?

A ‘global friend function’ allows you to access all the private and protected members of the global class declaration. A simple example of a C++ friend function used to print the length of the box.

What is friend function explain with example in C++?

A friend function can be declared in the private or public part of a class without changing its meaning. Friend functions are not called using objects of the class because they are not within the class’s scope. Without the help of any object, the friend function can be invoked like a normal member function.

What are the ways in which a friend function can be implemented?

There are some points to remember while implementing friend functions in our program:

• A friend function can be declared in the private or public section of the class.
• It can be called like a normal function without using the object.
• A friend function is not in the scope of the class, of which it is a friend.

What is friend function and friend class explain with example?

Friend Class A friend class can access private and protected members of other class in which it is declared as friend. It is sometimes useful to allow a particular class to access private members of other class. For example, a LinkedList class may be allowed to access private members of Node.

What are the advantages of friend function in C++?

Benefits of friend function

• A friend function is used to access the non-public members of a class.
• It allows to generate more efficient code.
• It provides additional functionality which is not normally used by the class.
• It allows to share private class information by a non member function.

Is a friend function a global function?

A Global function: A global friend function allows you to access all the private and protected members of the class, unlike a normal friend function that allows you to access only specific members of the class.

Can a friend function be a global function?

What is the biggest demerit of friendship?

Disadvantages of a friendship are many…. You will see change in your behaviour,offcourse negative. They will not help you in your bad times. They will drag you to bad things like cigarette ,drugs,alcohol,gambling and other things.

What is the advantage of friend function in C++?

Benefits of friend function A friend function is used to access the non-public members of a class. It allows to generate more efficient code. It provides additional functionality which is not normally used by the class. It allows to share private class information by a non member function.

Can a virtual function be friend of another class?

A virtual function can be a friend function of another class. They are always defined in the base class and overridden in a derived class. It is not mandatory for the derived class to override (or re-define the virtual function), in that case, the base class version of the function is used.

What are the characteristics of friend function in C++?

Characteristics of a Friend function:

• The function is not in the scope of the class to which it has been declared as a friend.
• It cannot be called using the object as it is not in the scope of that class.
• It can be invoked like a normal function without using the object.

What are the disadvantages of friend?