QTextStream does not read from stdin

[MasterBLB]

Hello guys

What's wrong with the code below that messagebox displays empty string??

QTextStream stream(stdout);
 
	std::cout<<"bla";
	qDebug()<<"ble";
 
	QString line("initial");
 
	line = stream.readLine();
 
	QMessageBox::about(0,0,line);

QTextStream stream(stdout);

	std::cout<<"bla";
	qDebug()<<"ble";

	QString line("initial");

	line = stream.readLine();

	QMessageBox::about(0,0,line);

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