Problem with "C++ GUI Programming with Qt4, 2nd Edition"

[LonelyZero]

Hey, folks.

So i'm trying to go over Qt with this book "C++ GUI Programming with Qt4, 2nd Edition". Two first exercises worked well with my Qt Creator 4.5.1 and mingw32 but then i got into first "big" program. Qt went apeshit with like 40 errors or something. What am i doing wrong? I guess it's version compatibility problem.

That's example from the book.

find.pro
finddialog.cpp
finddialog.h
main.cpp

[kbsk007]

this book was written for with Qt4 and you use Qt5
therefore you have to add to your finddialog.cpp file
the include statements:

#include <QLabel>
#include <QLineEdit>
#include <QCheckBox>
#include <QPushButton>
#include <QHBoxLayout>
#include <QVBoxLayout>

[d_stranz]

You will likely also have to edit (slightly) code that creates QMainWindow instances to use Qt::WindowFlags instead of whatever was used in Qt 4. That was so long ago I've forgotten.

[Lesiok]

Read this article.