Switching between console and GUI on startup

[EricF]

I'm trying to add console support to my already working application. So I get in the main to add some switch support to the command line but it is not poping any command line when entering the right switch. Here's a little main In crafted to try this coexistence :

#include <QApplication>
#include <QtGui>
 
// for cout
#include <iostream>
using namespace std;
 
int main( int argc, char** argv )
{
	bool console = false;
	if ( argc > 1 )
	{
		// Check if user selected console mode.
		for ( int i=1; i<argc; ++i )
		{
			if ( !strcmp( argv[i], "-console" ) )
			{
				console = true;
				break;
			}
		}
	}
 
	if ( console )
	{
		QCoreApplication app( argc, argv );
 
		// This is not working.
		cout << "Console Mode" << endl;
 
		// Try to write a file.
		QFile myFile( "C:\\Temp\\Test.txt" );
		myFile.open( QIODevice::WriteOnly | QIODevice::Text );
 
		QDataStream	stream( &myFile );
		stream << "Console is working but not showing";
 
		return 0;
	}
	else
	{
		QApplication app(argc, argv);
 
		QLabel* label = new QLabel( "GUI !!!" );
		label->show();
 
		return app.exec();
	}
}

#include <QApplication>
#include <QtGui>

// for cout
#include <iostream>
using namespace std;

int main( int argc, char** argv )
{
	bool console = false;
	if ( argc > 1 )
	{
		// Check if user selected console mode.
		for ( int i=1; i<argc; ++i )
		{
			if ( !strcmp( argv[i], "-console" ) )
			{
				console = true;
				break;
			}
		}
	}

	if ( console )
	{
		QCoreApplication app( argc, argv );

		// This is not working.
		cout << "Console Mode" << endl;

		// Try to write a file.
		QFile myFile( "C:\\Temp\\Test.txt" );
		myFile.open( QIODevice::WriteOnly | QIODevice::Text );

		QDataStream	stream( &myFile );
		stream << "Console is working but not showing";

		return 0;
	}
	else
	{
		QApplication app(argc, argv);

		QLabel* label = new QLabel( "GUI !!!" );
		label->show();

		return app.exec();
	}
}

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The file gets written but I don't get any output to the console. I added the switch to tell it is a command line app and I can see the output however, I will get a console even if I'm in GUI mode.

How can I achieve an application that can be executed in either mode ?

Another question, does my -console switch is already used by Qt ?