C++ program to demonstrate example of friend function with class.

C++ program to demonstrate the example of friend function with class.

Program Code:

#include <iostream>

using namespace std;

class Num

{

private:

int a;

public:

void getdata(int x);

//declaration of friend function

friend void putdata(Num N);

}; 

//class member function definitions outside the class declaration with Scope Resolution Operator (::)

void Num :: getdata(int x)

{

a=x;

} 

//friend function definition, outside the class declaration without Scope Resolution Operator (::)

void putdata(Num N)

{

cout << "Value of a (private data member of class Num) : " << N.a; 

} 

int main()

{

//Object declaration of class Num

Num obj; 

// call to member function of class with class object and dot (.) operator

obj.getdata(10);

// call to friend function of class without class object and dot (.) operator

putdata(obj); 

return 0;

}

The program output is tested on www.jdoodle.com

Output:

Value of a (private data member of class Num) : 10

Thanks

Mukesh Rajput