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    41 

    42 #include <QtGui>

    43 #include <QByteArray>

    44 #include <QDataStream>

    45 

    46 //! [0]

    47 struct Movie

    48 {

    49     int id;

    50     QString title;

    51     QDate releaseDate;

    52 };

    53 //! [0]

    54 

    55 //! [1]

    56 QDataStream &operator<<(QDataStream &out, const Movie &movie)

    57 {

    58     out << (quint32)movie.id << movie.title

    59         << movie.releaseDate;

    60     return out;

    61 }

    62 //! [1]

    63 

    64 //! [2]

    65 QDataStream &operator>>(QDataStream &in, Movie &movie)

    66 {

    67     quint32 id;

    68     QDate date;

    69 

    70     in >> id >> movie.title >> date;

    71     movie.id = (int)id;

    72     movie.releaseDate = date;

    73     return in;

    74 }

    75 //! [2]

    76 

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

    78 {

    79     QApplication app(argc, argv);

    80 

    81     Movie m;

    82     m.id = 0001;

    83     m.title = "Happy Meal";

    84     m.releaseDate = QDate(1995, 5, 17);

    85 

    86     QByteArray byteArray;

    87     QDataStream stream(&byteArray, QIODevice::WriteOnly);

    88     stream << m;

    89     

    90     // display

    91     qDebug() << m.id << m.releaseDate << m.title;

    92 

    93     Movie m2;

    94     

    95     int id2;

    96     QString title2;

    97     QDate date2;

    98 

    99     QDataStream stream2(byteArray);

   100     stream2 >> id2 >> title2 >> date2;

   101 

   102     m2.id = id2;

   103     m2.title = title2;

   104     m2.releaseDate = date2;

   105 

   106     qDebug() << id2 << " " << date2 << " " << title2;

   107 

   108     return 0;

   109 }