In this tutorial, we will learn how todemonstrate the concept of Friend Function, in the C++ programming language. To understand the concept ofFriend Functionand various other types ofClass Member functionsin CP
class className { friend returnType functionName(arguments); } C++ CopyThe keyword “friend” is placed only in the function declaration of the friend function and not in the function definition. When the friend function is called neither the name of the object nor the dot operator is used. ...
Friend Function Program in C++// C++ program to demonstrate example of // friend function with class #include <iostream> using namespace std; class Number { private: int a; public: void getNum(int x); //declaration of friend function friend void printNum(Number NUM); };...
1. Global function as Friend function in Class A In the following program, we define a class:A, in which a functiondisplay()is declared as a friend function. So, nowdisplay()function can access the private and protected members of classAtype objects, in this case its the variablex. C++...
In the main function, an object is created, s1, and showData(s1) is used to print the private data. Example 2: Add Members of Two Different Classes The friend function is used to access and manipulate the data from multiple classes. Cpp 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ...
Here is the following code for Function Friend in C++:Open Compiler #include <iostream> using namespace std; class Box { double width; public: friend void printWidth( Box box ); void setWidth( double wid ); }; // Member function definition void Box::setWidth( double wid ) { width =...
friendvoiddisplay(demo};//Friend function declaration }; voiddisplay(demo dd1) { cout<
two.cc: In member function âvoid TWO::print(ONE&)â: two.cc:4: error: invalid use of incomplete type âstruct ONEâ two.h:4: error: forward declaration of âstruct ONEâ two.cc:5: error: invalid use of incomplete type âstruct ONEâ ...
The following example shows how to overload operator plus (+) in order to add two “Cents” objects together: #include <iostream> class Cents { private: int m_cents {}; public: Cents(int cents) : m_cents{ cents } { } // add Cents + Cents using a friend function friend Cents oper...
4) What is a friend function? What is the difference between a friend function and a regular member function of a class? Object-oriented programming: Object-oriented programming is the most dramatic innovation in software development based on the conce...