Read/Write from QTextStream

[tonde]

I've just started with QT and I found something I can't understand.

Why won't this work?

QTextStream out("test",QIODevice::ReadWrite);
    out<<"hello";
    QString string;
    out >> string;

QTextStream out("test",QIODevice::ReadWrite);
    out<<"hello";
    QString string;
    out >> string;

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Only "test" is added to the string. Couldn't find a way to append "hello" to the string.