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

ARRAY, A PROGRAM TO CALCULATE AREA OF TRIANGLE

A PROGRAM TO CALCULATE AREA OF TRIANGLE

Algorithm , write an algorithm to swap values without using third variable

write an algorithm to swap values without using third variable

Add words in dictionary - c++ program, Add words in Dictionary: void D...

Add words in Dictionary: void Dictionary::add( Object& objectToAdd ) {     if( !objectToAdd.isAssociation() )         ClassLib_error( __ENOTASSOC );     else

Quick sort , Hi, I need quick sort program without using recursion

Hi, I need quick sort program without using recursion

Decode the code, Smugglers are becoming very smart day by day. Now they hav...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

write a scheme procedure to evaluate expression, (a) Write a Scheme proced...

(a) Write a Scheme procedure to evaluate the expression: 7/6+2*5+(3*2+6*7)*4. (b) Write a Scheme procedure to evaluate the expression: 2*(-1+(-3+4*2-7)*3/(3*2)).

Decode the code, Smugglers are becoming very smart day by day. Now they hav...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

Influence on Social media - for Geek''s, Recently social media has been flo...

Recently social media has been flooded by fb posts, tweets, news articles about only thing demonetization.A great debate is ongoing over it. Most of the people discussing in social

Wap to print series from 1 to 10 & find its square and cube, # include stdi...

# include stdio.h> # include conio.h> # include math.h>   void main () { int a=1,sqr=0,cube=0; clrscr (); while (a { sqr=pow(a,2); cube=pow(a,3);

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