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//friend_function

//friend to a particualar function only

#include<iostream>

using namespace std;

//forward declaration

class student;

class teacher

{

int x,y;

public: void set_data();

void get_data(student);

};

class student

{

int a,b;

public: void set_data()

{

cout<<"enter a and b"<<endl;

cin>>a>>b;

}

void get_data()

{

cout<<"a : "<<a<<" b: "<<b<<endl;

}

//get_data function can access the data from class student

friend void teacher :: get_data(student);

};

//function declaration

void teacher :: set_data()

{

cout<<"enter x and y"<<endl;

cin>>x>>y;

}

void teacher :: get_data(student s)

{

cout<<"a : "<<s.a<<" b: "<<s.b<<endl;

//trying to access data from another class

cout<<"x : "<<x<<" y: "<<y<<endl;

}

int main()

{

student s;

teacher t;

s.set_data();

s.get_data();

t.set_data();

t.get_data(s);

}