Qt Console application in Ubuntu

[feraudyh]

Hello,
I usually run Qt in Windows.
I created a Qt Console Application in Ubunti with the following code:

#include <QtCore/QCoreApplication>
#include <QtDebug>
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qDebug()<<"Hello World\n";
 
    return a.exec();
}

#include <QtCore/QCoreApplication>
#include <QtDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    qDebug()<<"Hello World\n";

    return a.exec();
}

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unfortunately it displays nothing at all, like it does in Windows.
There is a config += console in the project file.
What did I do wrong?