add of open, create, save, save as, exit)

mainwindow.h

@@ -32,6 +32,10 @@ private slots:
     void on_actionNouvelle_fiche_triggered();
     void on_actionSauvegarder_triggered();
 
+    void on_actionEnregistrer_sous_triggered();
+
+    void on_actionFermer_triggered();
+
 private:
     Ui::MainWindow *ui;