Reading from QFile when QTextStream is open

I use

Code:

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QTextStream in(stdin, QIODevice::ReadOnly)

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To read text from standard input. But I need getChar() function to block execution until user press enter so i need to open

Code:

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file.open(stdin, QIODevice::ReadOnly);

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Is this ok to call QFile::getChar when file is already open in QTextStream?

Why would you do that?

You can use QTextStream to write chars into the file. See operator <<

I want to read characters, not write.
I need that because I want to block execution until user press enter. Something like this won't work

Code:

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QString temp; 
 QTextStream in(stdin, QIODevice::ReadOnly);
in >>temp;

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if user press enter without pressing any other character before. So I need QFile::getChar()