#ifndef _BOMB#include "bomb.h"#endifGtkWidget* main_window;GtkWidget* vbox;GtkWidget* hbox;GtkWidget* main_frame;GtkWidget* table;GtkWidget* button;GtkWidget* toolbar;GtkWidget* item;GtkWidget* area;GtkWidget* eventbox;GtkWidget* label;GtkWidget* timelab;extern gint MAX_ROW;extern gint MAX_COL;extern gint MAX_BOMB;void create_interface ();extern void area_expose (GtkWidget* widget, GdkEvent* event);extern gint button_press (GtkWidget* widget, GdkEventButton *event, gpointer data);extern gint new_game (GtkWidget* widget, GdkEvent* event);extern gint pref_set (GtkWidget* widget, GdkEvent* event);extern gint quit_game (GtkWidget* wdiget, GdkEvent* event, gpointer data);