mainmenu.h
#ifndef MAINMENU_H
#define MAINMENU_H

#include <QMainWindow>

class Menus : public QMainWindow
{
    Q_OBJECT

public:
    Menus();
    void menuSimple();

private:
    void menuFull();
    QMenu *fileMenuSimple;
    QMenu *fileMenuFull;
    QMenu *helpMenuSimple;
    QMenu *helpMenuFull;
    QAction *exitAction;
    QAction *newAct;

private slots:
    void about();
};
#endif



mainmenu.cpp

#include <QtGui>
#include "mainmenu.h"

Menus::Menus()
{
}

void Menus::menuSimple()
{
    helpMenuSimple = menuBar()->addMenu(tr("&Help"));
    helpMenuSimple->addAction(newAct);
     newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
}



mainwindow.cpp

#include <QtGui>
#include "mainwindow.h"
#include "classes/menus/mainmenu.h"
MainWindow::MainWindow()
{
    createStatusBar();

    Menus menus;
    menus.menuSimple();

}