Zach

#include <FL/Fl.H>#include <FL/Fl_Window.H>#include <FL/Fl_Button.H>#include <FL/Fl_Input.H>#include <FL/Fl_Output.H>#include <cstdlib>                   //for exit(0)#include <string.h>using namespace std;void copy_cb( Fl_Widget* , void* );  //function prototypesvoid close_cb( Fl_Widget* , void* );void make_window();  int main() {   make_window();   return Fl::run();}void make_window() {    Fl_Window* win= new Fl_Window(300,200, "Leet Converter");   win->begin();            Fl_Button*  copy = new Fl_Button( 10, 150, 70, 30, "C&opy"); //child 0   : 1st widget      Fl_Button* close = new Fl_Button(100, 150, 70, 30, "&Quit"); //child 1    : 2nd widget      Fl_Input*       inp = new Fl_Input(50, 50, 140, 30, "Input");              //child 2 : 3rd widget      Fl_Output*    out = new Fl_Output(50, 100, 140, 30, "Out");     //child 3   : 4th widget   win->end();   copy->callback(  copy_cb );   close->callback( close_cb );   win->show(); }void copy_cb( Fl_Widget* o , void* ) {   Fl_Button* b=(Fl_Button*)o;   Fl_Input* iw = (Fl_Input*) b -> parent() -> child(2);   Fl_Output* ow = (Fl_Output*) b -> parent() -> child(3);   ow->value( iw->value() );}void close_cb( Fl_Widget* o, void*) { exit(0);}