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

Function that have parameter and makes an integer mask, Write a function th...

Write a function that has an int parameter n, makes an integer mask having the bit 1 at the nth place from the rightmost bit, and returns the mask. For example, when n = 5 is passe

Write a Programme that computes the price of portfolio, write a programme t...

write a programme that computes the price of shares and options. do the options in one-period binomial model.

Basics, conceptual difference between big o,big thete and big omega

conceptual difference between big o,big thete and big omega

Program to calculate tax - c++, Program to calculate tax: float tax (f...

Program to calculate tax: float tax (float) ; int main() {                 float purchase, tax_amt, total;                 cout                 cin >> purchase

Minimum Shelf , At a shop of marbles, packs of marbles are prepared. Packet...

At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers

C program to returns the string, Program is to take two arguments and retur...

Program is to take two arguments and returns the string: Program is to take two arguments and returns the string which is larger the larger string has larger ascii value invok

C program for function of copy one string in other string, C Program for FU...

C Program for FUNCTION OF COPY ONE STRING IN OTHER STRING #include stdio.h> #include conio.h> int copy(char a[],char b[]); void main() {           char a[100],b[

Optimize and profile a c++ library for speed, Optimize and Profile a C++ li...

Optimize and Profile a C++ library for speed Project Description:  Optimize and Profile an existing C++ library for speed. This library uses OpenMP and OpenCV and C++ stan

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