progetti qt

#include <QFile>
#include <QDebug>

   QFile f("/home/luca/luca.dat");
    f.open(QIODevice::WriteOnly | QIODevice::Append);
    QDataStream out(&f);
    out<<quint16(270);
    f.close();

    QFile g("/home/luca/luca.dat");
    g.open(QIODevice::ReadOnly);
    QDataStream in(&g);
    qint16 letto;
    in >> letto;
    qDebug() << letto;