C++ Friend Function

#include<iostream>

using namespace std;

//🙂First class with friend function

class DF;

class DM

{

    int m;

    int cm;

public:

    void get();

    void put();

    friend void compare(DM,DF);

};

//🙂Second class with friend function

class DF

{

    int f;

    int i;

public:

    void get();

    void put();

    friend void compare(DM,DF);

};

//😊 First class input

void DM::get()

{

    cout<<"Enter Meter:";

    cin>>m;

    cout<<"Enter Cemi:";

    cin>>cm;

}

//😊 First class output

void DM::put()

{

    cout<<"Meter="<<m;

    cout<<"Cemi="<<cm;

}

//😊 Second class input

void DF::get()

{

    cout<<"Enter feet:";

    cin>>f;

    cout<<"Enter Inch:";

    cin>>i;

}

//😊 Second class output

void DF::put()

{

    cout<<"Feet="<<f;

    cout<<"Inch="<<i;

}

//They 😸are friends now.

void compare(DM mm,DF ff)

{

    int temp1,temp2;

    temp1=mm.m*3.28;

    temp2=mm.cm/2.54;

    

    cout<<"Feet="<<ff.f+temp1;

    cout<<"Inch="<<ff.f+temp2;

}

//😇Last and final part

int main()

{

    DM a;

    DF b;

    a.get();

    b.get();

    compare(a,b);

}