Friend function in c++ for more c++ program visit at : clanguage1165.blogspot.com for any query mail me : hvaghela205@gmail.com

1. TOPIC :- FRIEND FUNCTION
Created by– Harsh Vaghela

2. FRIEND FUNCTION
 Friend function means to share data between two class.
SYNTEX :-
class name
{
public:
void get_data()
{
cout<<“ “;
}
friend
void function ();
}

3.  A friend function does not belong to the class to which it is
declared friend.
 A friend function is invoked just like an other c++ function without
using the object as it is not a part of the class.
 It cannot access the data members directly function. It has to
use of the object name along with the dot operator.
 It can declared private, public or protected without altering the
meaning.
 usually, it has object as arguments.
CHARACTERISTIC OF
FRIEND FUNCTION

4. EXAMPLE
INPUT :-
#include<iostream>
using namespace std;
class sample
{
int a;
int b;
public:
void setvalue() {a=25; b=40;}
friend float mean(sample s);
};

5. float mean(sample s)
{
return float(s.a + s.b)/2.0;
}
int main()
{
sample X; //object X
X.setvalue();
cout<<“Mean value =“ <<mean(X)<<“n”;
return 0;
}

6. Note:- The friend function accesses the class
variables a and b by using the dot operator and the object
passed to it. The function call mean(X) passes the object X
by value to the friend function.
• OUTPUT :-
Mean value = 32.5

7. THANK YOU

8.  For more c++ program visit at :
clanguage1165.blogspot.com
 For any query contact me at : hvaghela205@gmail.com