Не удаётся открыть файл в бинарном режиме

#include "stdafx.h"
#include <locale>
#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
#include <string.h>
#include <stdio.h>
using namespace std;
 
int main()
{
    setlocale (LC_ALL, "Russian");
 
    string address_current = "1.txt";
    string address_current_bin = "1.bin";
    
    fstream file_current;
    file_current.open(address_current);
    fstream file_current_bin;
    file_current_bin.open(address_current_bin, ios::binary | ios::in);
    
    if (!file_current)
    {
        cerr << "(file_current) could not be opened.\n";
        system ("Pause");
        exit (1);
    }
    if (!file_current_bin)   //эту проверку не проходит
    {
        cerr << "<file_current_bin> could not be opened.\n";
        system ("Pause");
        exit (1);
    }
 
    /* ... */
    
    system ("Pause");
    return 0; 
}

(file_current_bin) could not be opened.
Для продолжения нажмите любую клавишу ...

fstream file_current_bin;
file_current_bin.open("1.bin", ofstream::binary | ofstream::in);
file_current_bin.open("1.bin", ios_base::binary | ios_base::in);
file_current_bin.open("1.bin", ios::binary | ios::in);
file_current_bin.open("1.bin", ofstream::binary);
file_current_bin.open("1.bin", ios_base::binary);
file_current_bin.open("1.bin", ios::binary);

 file_current_bin.open(address_current_bin, ios::binary | ios::out);

    ofstream file_current_bin(address_current_bin, ios::binary);

fstream file_current_bin;
file_current_bin.open("1.txt",ios_base::binary | ios_base::out);