text: #include "mainwindow.h"
  #include <QApplication>
  #include <QDebug>
  int main(int argc, char *argv[])
  {
  #if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0))
      QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
  #endif // if (QT_VERSION >= QT_VERSION_CHECK(5, 9, 0))
      QApplication a(argc, argv);
      MainWindow   w;
  
  
      w.show();
  
      return a.exec();
  }
  