Stream function compatible with cstring--cmyfile

explain

This part of the program is not very useful , Just let C++ The file I / O program in is compatible with CString, Prior to Excel and Txt Used in reading and writing programs .

Program

//Cmyfile.h
#pragma once
#include <fstream>
#include <iostream>
#include <string>
#include <cstring>
using namespace std;
// It's no use , Pure fragmentation is to make stream functions compatible CString
class Cmyfile 
{
    
public:Cmyfile() {
     }
	   friend ifstream  & operator>>(ifstream & debug, CString str);  //str Cannot be a reference , The reason is not clear 
	   friend ofstream & operator<<(ofstream & debug, CString & str);   //str Must be a reference 
};

//Cmyfile.cpp
#include "pch.h"
#include "Cmyfile.h"
ifstream & operator>>(ifstream & debug, CString  str)
{
    
	// TODO:  Insert... Here  return  sentence 
	debug >> str.GetBuffer();
	return debug;
}

ofstream & operator<<(ofstream & debug, CString & str)
{
    
	// TODO:  Insert... Here  return  sentence 
	debug << str.GetBuffer();
	return debug;
}

Last

nothing