ofstream and fltk

[bchinfosieeuw]

How can I make a textile in a FLTK executable in main(), so when opening the program, and put text in it? The standard way via ofstream does not work now.
The code I want to elaborate on is on this website:
http://www.fltk.org/strfiles/267/fltk_input.cpp

Now when I add

    ofstream myfile;
    myfile.open ("example.txt");
    myfile << "Writing this to a file.\n";
    myfile.close();

in the main() method, there is not made a file into the directory when running the executable. I use

#include <iostream>
#include <fstream>
using namespace std;

at the beginning of the file. Compiling using
fltk-config --compile test.cxx
and
g++ test.cxx `fltk-config --cxxflags --ldflags` -o test
is already tried.

Does someone know why and how to get it working?