#include <QtWidgets/QMainWindow>
Error:cannot open source file “QtWidgets/QMainWindow”
Search for the MainWindow file in the QT library and display it in the QtGui folder, and modify it to #include <QtGui/QMainWindow>
#include <QtWidgets/QMainWindow>
Error:cannot open source file “QtWidgets/QMainWindow”
Search for the MainWindow file in the QT library and display it in the QtGui folder, and modify it to #include <QtGui/QMainWindow>