[Interest] reading from and writing to a file with QDataStream

[Sina Dogru]

Well but, I am writing a QString to QByteArray,

QByteArray bai;
QDataStream out(&bai, QIODevice::WriteOnly);
out << QString("A QString");

And writing an 'int' and QByteArray which a QString written

file.open(QIODevice::WriteOnly);
QDataStream out2(&file); // and module A write those datas to a file.
out2 << bai.size();
out2 << bai;

I might screwed totally? :S
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