Print to console in Qt

To print to console in Qt

1. write the code the usual console output way, e.g. "std::cout << ...", Note that any QString object must be quoted inside "qPrintable" function, e.g. "std::cout << qPrintable(QString("hello")) << .."
2. enter "qmake -project"
3. add "CONFIG += console" to the xxx.pro file
4. enter "qmake"
5. enter "make"