How to print to console when using Qt

Easy to print the  stderr,  the following streams are original for debugging:

//qInfo is qt5.5+ only.
qInfo() << "C++ Style Info Message";
qInfo( "C Style Info Message" );
 
qDebug() << "C++ Style Debug Message";
qDebug( "C Style Debug Message" );
 
qWarning() << "C++ Style Warning Message";
qWarning( "C Style Warning Message" );
 
qCritical() << "C++ Style Critical Error Message";
qCritical( "C Style Critical Error Message" );
 
// qFatal does not have a C++ style method.
qFatal( "C Style Fatal Error Message" );

The comments is to bear in mind qDebug messages are removed if QT_NO_DEBUG_OUTPUT is define

QTextStream& qStdOut()
{
static QTextStream ts( stdout );
return ts;
}

The follow as

qStdOut() << “std out!”;

The simplest method:

#include <QTextStream>
 
QTextStream out(stdout);
foreach(QString x, strings)
 out << x << endl;

Add the project file:

CONFIG += console