QFile fileWrite( "d:\\temp.tmp");
    if( !fileWrite.open( QIODevice::WriteOnly))
    {
        qCritical( "Can'not open file: %s for read", "d:\\temp.tmp");
        return -1;
    }
    
    QString arr[] = { "тест 1",  "тест 2", "тест 2"};

    QTextCodec *pCodec = QTextCodec::codecForName( "windows-1251");
    QTextCodec::setCodecForCStrings( pCodec);

    QTextStream in( &fileWrite);
    in.setCodec( pCodec);
    for( int n = 0; n < 3; n++)
        in << arr[n] << " ";
    fileWrite.close();

QString arr[] = { "тест 1",  "тест 2", "тест 2"};