UserIntertface.h
#pragma once
#ifndef USERINTERFACE_
#define USERINTERFACE_

#include <string>
#include <iostream>
using namespace std;


class UserInterface
{

private:

public:
// Constructor
UserInterface();
// Virtual Destructor
virtual ~UserInterface();

void Print_Menu();
void Print_Message_1();
};


#endif

UserInterface.cpp
#include "UserInterface.h"

UserInterface::UserInterface() // Constructor
{

}

UserInterface::~UserInterface() // Destructor
{

}

void UserInterface::Print_Menu()
{
cout << "...";
}

void Print_Message_1()
{
cout << "...";
}

FileOperations.h
#pragma once
#ifndef FILEOPERATIONS_
#define FILEOPERATIONS_

#include <string>
#include <cstring>
#include <iostream>
#include <fstream>
#include "boost/filesystem/operations.hpp"
#include "boost/filesystem/fstream.hpp"
#include <boost/filesystem/operations.hpp>
#include "UserInterface.h"
using namespace boost::filesystem;

using namespace std;


class FileOperations
{

private:
UserInterface UI1;

public:
// Constructor
FileOperations();
// Virtual Destructor
virtual ~FileOperations();

void F1();
};


#endif

FileOperations.cpp
#include "FileOperations.h"
#include "UserInterface.h"



FileOperations::FileOperations() // Constructor
{

}

FileOperations::~FileOperations() // Destructor
{

}

void FileOperations::F1()
{

UI1.Print_Message_1();
...
...
...
}