What is friend functions, C/C++ Programming

Assignment Help:

Friend Functions

One of the major features of OOP is information hiding. A class encapsulates data and methods to operate on that data in a single unit. The data from the class can be accessed only by member functions of the class. This restricted access not only hides the execution details of the methods and the data structure, it also saves the data from any possible misuse, accidental or otherwise. Though, the concept of data encapsulation sometimes takes information hiding too far. There are situations where a rigid and controlled access leads to inconvenience and hardships.

For example, consider a case where a function is needed to operate on object of two different classes. This function cannot be made a member of both the classes. What can be done is that a function can be explained outside both the classes and made to operate on both. That is, a function not belonging to either, but able to access both. Such a function is known as a friend function. In other words, a friend function is a non-member function, which has access to a class's private members. It is like allowing access to one's personal belongings to a friend.

 


Related Discussions:- What is friend functions

Stone game, A game is played with three piles of stones and two players. At...

A game is played with three piles of stones and two players. At her turn, a player removes one or more stones from the piles. However, if she takes stones from more than one pile,

C expressions - assume variables are double or float, Assume variables x, f...

Assume variables x, f, and d are of type int, float, and double, respectively.  Their values are arbitrary, except that neither f nor d equals +∞, -∞, or NaN .  For each of the fo

Keywords in cpp, Define Keywords in C++ K e y w o r d s: ...

Define Keywords in C++ K e y w o r d s: K e y w o rd s a r e t h e w o rd s a l r e a d y u s e d b y C + + i n i t s c

Compiling/ installing openvpn client within an ip camera, Project Descripti...

Project Description: I want someone with experience on adding/compiling/installing the OpenVPN client software within an IP network camera's embedded operating system. Either if

Write a function to calculate the exchange rate, Write a function to calcul...

Write a function to calculate the exchange rate of pounds to dollars  Answer       Td = 2xTp   The parameter passed over is the number of pounds and returned the value in do

Multilevelinheritance inc++, develop a program read the following informati...

develop a program read the following information from the keyboard in which base class consist of employee name code and destingnation the derived class contain the data members th

Addition of array elements, Addition of array elements: #define rows 3 ...

Addition of array elements: #define rows 3 #define cols 3 void main() {                 int i=0,j=0,sum=0;                 int arr[rows][cols];

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd