QFile111

int main(int argc, char *argv[])

{

    QCoreApplication a(argc, argv);

    QFile file("textFileAAA.txt");

    if(file.open(QIODevice::ReadOnly))

    {

       char buffer[2048];

       qint64 lineLen = file.readLine(buffer,sizeof(buffer));

       if(lineLen!=-1)

       {

           qDebug()<<buffer;

       }

    }

    return a.exec();

}

QFile file("textFileAAA.txt");

file.open(QIODevice::ReadOnly)

file.readLine(buffer,sizeof(buffer)