Friend Function Example in C++


Description:

C++ Friend Functions. A friend function of a class is defined outside that class' scope but it has the right to access all private and protected members of the class. Even though the prototypes for friend functions appear in the class definition, friends are not member functions.

Example Program:

Here is the simple program using friend function in C++.

Source Code

#include<iostream>
using namespace std;
class Complex
{
public :
    int real;
    int img;
    friend Complex operator +(Complex c1,Complex c2);
};
Complex operator+(Complex c1,Complex c2)
{
    Complex temp;
    temp.real=c1.real+c2.real;
    temp.img=c1.img+c2.img;
    return temp;
}
int main()
{
    Complex c1,c2,c3;
    c1.real=5;
    c1.img=3;
    c2.real=10;
    c2.img=5;
    c3=c1+c2;
    cout<<"\nReal : "<<c3.real;
    cout<<"\nImg : "<<c3.img;
    return 0;
}
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Output

Real : 15
Img : 8

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