程式語言 - The Fast Light Tool Kit (FLTK) - CPP - Hello, world!

參考資訊：
https://www.fltk.org/doc-1.3/index.html

#include <iostream>
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
 
int main(int argc, char **argv)
{
    Fl_Window *window = new Fl_Window(320, 240, "Hello, world!");
    window->end();
    window->show(argc, argv);
    return Fl::run();
}

編譯、執行

$ g++ main.cpp -o main -lfltk
$ ./main