Friend Function in C++(Cpp)

Friend Function is basically a function which has access to private and protected data members of a class(outside the scope of a Particular Class).

Class by default has a private scope for all the data members and member functions,inorder to access private and protected data members outside the scope of a particular we maek use of Friend Function.

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Let’s us Consider The below Code snippet :

Friend Functions in C++(Cpp)

The Friend Function Prototype is depicted as followed:

Friend Function Prototype

Now Lets consider the Implementation of Friend Function over here:

Implementation of Friend Function

Now with the implementation of Friend Function we are able to access the Private data members of class(student_name and roll_no) even when these private data members have a restricted scope within the class(private scope) over here.

Now lets analyse the Output for the above defined Program:

Output Pic

Here the User is prompted to Insert Student Name along with Roll number,after entering the respective details,this Object is being Passed as a Parameter to the Friend Function,now the Friend Function is able to access the Data Members of the Above defined Class and generates the Final Output over here.