Step by Step solution about How to resolve the algorithm Hello world/Graphical step by step in the C++ programming language

Gtkmm

• This code uses the Gtkmm library to create a simple graphical application in C++.
• It creates a main application object, a message dialog with the text "Goodbye, World!", and runs the dialog.

MFC (Microsoft Foundation Class Library)

• This code uses the MFC library to create a simple graphical application in C++.
• It defines a function, ShowGoodbyeWorld, which sets the text of a window to "Goodbye, World!".

FLTK (Fast Light Toolkit)

• This code uses the FLTK library to create a simple graphical application in C++.
• It creates a window, a box with the text "Goodbye, World!", and runs the application.

#include <gtkmm.h>
int main(int argc, char *argv[])
{
   Gtk::Main app(argc, argv);
   Gtk::MessageDialog msg("Goodbye, World!");
   msg.run();
}


#include "afx.h"
void ShowGoodbyeWorld(CWnd* pWnd)
{
    pWnd->SetWindowText(_T("Goodbye, World!"));
}


#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Box.H>

int main(int argc, char **argv) {
  Fl_Window *window = new Fl_Window(300,180);
  Fl_Box *box = new Fl_Box(20,40,260,100,"Goodbye, World!");
  box->box(FL_UP_BOX);
  box->labelsize(36);
  box->labelfont(FL_BOLD+FL_ITALIC);
  box->labeltype(FL_SHADOW_LABEL);
  window->end();
  window->show(argc, argv);
  return Fl::run();
}