code cleanup

mainwindow.cpp

@@ -16,15 +16,12 @@ using std::vector;
 MainWindow::MainWindow(QWidget * parent)
     : QMainWindow(parent), ui(new Ui::MainWindow) {
     ui->setupUi(this);
-    this->interfaceTraining = NULL;
+    this->interfaceTraining = nullptr;
 
-    this->interfaceRace = NULL;
-    this->interfaceSettings = NULL;
-    this->interfaceRennliste = NULL;
+    this->interfaceRace = nullptr;
+    this->interfaceSettings = nullptr;
+    this->interfaceRennliste = nullptr;
 
-    // test = new HardwareSetup;
-
-    // this->test->start();
     QObject::connect(ui->pushButton, SIGNAL(clicked()), this,
                      SLOT(NewWindowSettings()));
 
@@ -43,9 +40,10 @@ MainWindow::MainWindow(QWidget * parent)
 
     this->db = new DataBase;
 
-    vector<vector<QString>> daten = db->getData("select * from Fahrer", 2);
+    // vector<vector<QString>> daten = db->getData("select * from Fahrer", 2);
 }
 void MainWindow::closeEvent(QCloseEvent * event) {
+    Q_UNUSED(event);
 }
 
 MainWindow::~MainWindow() {