Menu Bar disappears when the app is restarted

[guidupas]

SOLVED

int main(int argc, char *argv[])
{
    int codigoSaida = 0;
 
    QApplication a(argc, argv);
 
    do{
        a.exit();
 
        MainWindow w;
        w.show();
 
        codigoSaida = a.exec();
 
    }while(codigoSaida == CODIGO_RESTART);
 
    return codigoSaida;
}

int main(int argc, char *argv[])
{
    int codigoSaida = 0;

    QApplication a(argc, argv);

    do{
        a.exit();

        MainWindow w;
        w.show();

        codigoSaida = a.exec();

    }while(codigoSaida == CODIGO_RESTART);

    return codigoSaida;
}

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