int main()
{
    // TESTS

    cout << " \n\n ------ CFileLastError ------ \n\n";
    CFileLastError file;
    file.vOpenFile("Text.txt");
    cout << file.bGetLastError() << endl;
    file.vPrintLine("test");
    cout << file.bGetLastError() << endl;

    // we are using 'w+' operator which in case of missing file creates a new one, so no error
    CFileLastError file2;
    file2.vOpenFile("not_existing_file.txt");
    cout << file2.bGetLastError() << endl;
    file2.vPrintLine("test");
    cout << file2.bGetLastError() << endl;

    CFileLastError file3;
    // we are not opening file, should return error
    file3.vPrintLine("test");
    cout << file3.bGetLastError() << endl;

    CFileLastError file4("file4.txt");
    cout << file4.bGetLastError() << endl;
    vector<string> vect;
    vect.push_back("1");
    vect.push_back("2");
    vect.push_back("3");
    file4.vPrintManyLines(vect);
    cout << file4.bGetLastError() << endl;


    cout << " \n\n ------ CFileThrowEx ------ \n\n";
    // this one throws exception  'file not opened'
    // comment out 'vOpenFile()' line to throw exception !!!
    CFileThrowEx file5;
    file5.vOpenFile("Text.txt");
    file5.vPrintLine("test");

    CFileThrowEx file6;
    file6.vOpenFile("Text.txt");
    file6.vPrintLine("test");


    cout << " \n\n ------ CFileErrorCode ------ \n";
    cout << "~0 - NO ERROR \n~1 - ERROR\n\n";

    CFileErrCode file7;
    cout << file7.bOpenFile("Text.txt") << endl;
    cout << file7.bPrintLine("test") << endl;


    // should return error
    CFileErrCode file8;
//  cout << file8.bOpenFile("Text.txt") << endl;
    cout << file8.bPrintLine("test") << endl;



    // actual task

    cout << " \n\n ------ CFileLastError ------ \n\n";
    openWithLastError("hello.txt");

    cout << " \n\n ------ CFileThrowEx ------ \n\n";
    openWithThrowEx("hello.txt");

    cout << " \n\n ------ CFileErrorCode ------ \n\n";
    openWithErrorCode("hello.txt");

    cout << " \n\n ------ The End ------ \n\n";
    return 0;

}