Communicating with program for GUI input

[d_stranz]

You might be able to run the external program in a QProcess and redirect its stdout into stdin of your Qt program. See QProcess::setProcessChannelMode()

Here's some code from a stackoverflow accepted answer to a similar question:

QProcess p;
p.start( /* whatever your command is, see the doc for param types */ );
p.waitForFinished(-1);
 
QString p_stdout = p.readAllStandardOutput();

QProcess p;
p.start( /* whatever your command is, see the doc for param types */ );
p.waitForFinished(-1);

QString p_stdout = p.readAllStandardOutput();

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This, however, blocks your Qt app while the external process is running. You could also connect slots to QProcess signals (finished(), readyReadStandardOutput) and not use waitForFinished. See this other stackoverflow answer.