access remote mysql db using qt framework

[Qt] access remote mysql database

#include <QCoreApplication>
#include <QSqlDatabase>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL3");
    db.setHostName("db4free.net");
    db.setPort(3307);
    db.setDatabaseName("testshajudb");
    db.setUserName("");
    db.setPassword("");

    if (!db.open()) {
        qDebug() << "unable to open database";
    } else {
        qDebug() << " db open success";
    }

    return a.exec();
}