#include<gtk/gtk.h>void hello(GtkWidget *widget,gpointer data){	g_print("Hello Ubuntu!\n");}gint delete_event(GtkWidget *widget,GdkEvent *event,gpointer data){	g_print ("delete event occurred\n");	return(TRUE);}void destroy(GtkWidget *widget,gpointer data){	gtk_main_quit();}int main( int argc, char *argv[] ){	GtkWidget *window;	GtkWidget *button;	gtk_init (&argc, &argv);	window=gtk_window_new (GTK_WINDOW_TOPLEVEL);	gtk_signal_connect (GTK_OBJECT(window),"delete_event",GTK_SIGNAL_FUNC(delete_event),NULL);	gtk_signal_connect (GTK_OBJECT (window), "destroy",GTK_SIGNAL_FUNC (destroy), NULL);	gtk_container_set_border_width (GTK_CONTAINER (window), 10);	button = gtk_button_new_with_label ("Hello Ubuntu!");	gtk_signal_connect (GTK_OBJECT (button), "clicked",GTK_SIGNAL_FUNC (hello), NULL);	gtk_signal_connect_object (GTK_OBJECT (button), "clicked",GTK_SIGNAL_FUNC (gtk_widget_destroy),GTK_OBJECT (window));	gtk_container_add (GTK_CONTAINER (window), button);	gtk_widget_show (button);	gtk_widget_show (window);   /*顯示一個窗口*/	gtk_main();   /*進入主循環*/	return(0);}