Can a friend function be a member of another class?

A friend function is a function that is not a member of a class but has access to the class’s private and protected members. and ->) unless they are members of another class. A friend function is declared by the class that is granting access. The friend declaration can be placed anywhere in the class declaration.

Is friend function a member function?

What is Friend Function? Friend functions of the class are granted permission to access private and protected members of the class in C++. They are defined globally outside the class scope. Friend functions are not member functions of the class.

How can we make member function of one class as a friend of another class?

To make a function as a friend of a class, it is declared inside the class either in private or in public section with keyword friend before its declaration as follows. }; Here temp is a friend function of the class Temperature. So, it can access all the private and protected members of the class.

How do you declare a friend function?

A friend function can access the private and protected data of a class. We declare a friend function using the friend keyword inside the body of the class.

What is friend function with example?

In object-oriented programming, a friend function, that is a “friend” of a given class, is a function that is given the same access as methods to private and protected data. Friend functions allow alternative syntax to use objects, for instance f(x) instead of x.f() , or g(x,y) instead of x.g(y) .

What does friend function and friend class mean?

A friend function of a class is defined outside that class’ scope but it has the right to access all private and protected members of the class. A friend can be a function, function template, or member function, or a class or class template, in which case the entire class and all of its members are friends.

What is member function Explain friend function with example?

A friend function is a function that is specified outside a class but has the ability to access the class members’ protected and private data. A friend can be a member’s function, function template, or function, or a class or class template, in which case the entire class and all of its members are friends.

What is member function with example?

Member functions are operators and functions that are declared as members of a class. Member functions do not include operators and functions declared with the friend specifier. When the function add() is called in the following example, the data variables a , b , and c can be used in the body of add() .

What is friend function explain with example?

What is friend function write its characteristics?

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.

Which keyword is used to represent a friend function?

friend keyword
Explanation: friend keyword is used to declare a friend function. Sanfoundry Global Education & Learning Series – C++ Programming Language.

Which of the following describes a friend function?

Which of the following is correct about friend functions? Explanation: Friend function can be declared either in private or public part of the class. A friend function cannot access the members of the class directly. They use the dot membership operator with a member name.

Can a function declare itself as a friend of a class?

A function or class cannot declare itself as a friend of any class. In a class definition, use the friend keyword and the name of a non-member function or other class to grant it access to the private and protected members of your class.

Can friend functions be defined in a header file?

} Does it have anything to do with friend functions needing to be defined in header files? It can be defined in a cpp file, but it needs to at least be declared in a header file, otherwise all places where you want to use it will only see the stuff the stream itself gives you, not your overload.

How does the complier know a given function is a friend function?

The complier knows a given function is a friend function by the use of the keyword friend. For accessing the data, the declaration of a friend function should be made inside the body of the class (can be anywhere inside class either in private or public section) starting with keyword friend.

What is friend function in C++ with example?

friend Function in C++. If a function is defined as a friend function then, the private and protected data of a class can be accessed using the function. The complier knows a given function is a friend function by the use of the keyword friend.