#include <glib.h>
#include <gtk/gtk.h>
#include <iostream>
using namespace std;
#ifndef CONNECT4MENU_H
#define CONNECT4MENU_H
static gboolean deleteEvent( GtkWidget *widget, GdkEvent *event, gpointer data);
static int startGame(GtkWidget *widget, GdkEvent *event, gpointer data);
static int gui();
GtkWidget *window;
GtkWidget *button;
GtkWidget *button2;
GtkWidget *button3;
GtkWidget *button4;
GtkWidget *button5;
GtkWidget *button6;
GtkWidget *box1;
GtkWidget *box2;
GtkWidget *box3;
GtkWidget *box4;
GtkWidget *box5;
GtkWidget *box6;
GSList    *group;
GSList    *group2;
int gamet = 0;
static int gui()
{
 window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 g_signal_connect(G_OBJECT(window), "delete_event", G_CALLBACK(deleteEvent), NULL);
 box3 = gtk_vbox_new(FALSE, 0);
 gtk_container_add(GTK_CONTAINER(window), box3);
 gtk_widget_show(box3);
 box1 = gtk_hbox_new(FALSE, 0);
 gtk_container_add(GTK_CONTAINER(box3), box1);
 gtk_widget_show(box1);
 button = gtk_radio_button_new_with_label(NULL, "1 Player");
 gtk_box_pack_start(GTK_BOX(box1), button, TRUE, TRUE, 0);
 gtk_widget_show(button);
 group = gtk_radio_button_get_group(GTK_RADIO_BUTTON(button));
 button2 = gtk_radio_button_new_with_label(group, "2 Player");
 gtk_box_pack_start(GTK_BOX(box1), button2, TRUE, TRUE, 0);
 gtk_widget_show(button2);
 box4 = gtk_vbox_new(FALSE, 0);
 gtk_container_add(GTK_CONTAINER(box3), box4);
 gtk_widget_show(box4);
 box2 = gtk_hbox_new(FALSE, 0);
 gtk_container_add(GTK_CONTAINER(box4), box2);
 gtk_widget_show(box2);
 button3 = gtk_radio_button_new_with_label(NULL, "Easy");
 gtk_box_pack_start(GTK_BOX(box2), button3, TRUE, TRUE, 0);
 gtk_widget_show(button3);
 group2 = gtk_radio_button_get_group(GTK_RADIO_BUTTON(button3));
 button4 = gtk_radio_button_new_with_label(group2, "Medium");
 gtk_box_pack_start(GTK_BOX(box2), button4, TRUE, TRUE, 0);
 gtk_widget_show(button4);
 group2 = gtk_radio_button_get_group(GTK_RADIO_BUTTON(button4));
 button5 = gtk_radio_button_new_with_label(group2, "Expert");
 gtk_box_pack_start(GTK_BOX(box2), button5, TRUE, TRUE, 0);
 gtk_widget_show(button5);
 box5 = gtk_vbox_new(FALSE, 0);
 gtk_container_add(GTK_CONTAINER(box4), box5);
 gtk_widget_show(box5);
 button6 = gtk_button_new_with_label ("Start Game");
 g_signal_connect (G_OBJECT (button6), "clicked", G_CALLBACK (startGame), NULL);
 gtk_box_pack_start(GTK_BOX (box5), button6, TRUE, TRUE, 0);
 gtk_widget_show(button6);
 gtk_widget_show(window);
 gtk_main();
}
static gboolean deleteEvent(GtkWidget *widget, GdkEvent *event, gpointer data)
{
 gtk_main_quit();
 return FALSE;
}
static int startGame(GtkWidget *widget, GdkEvent *event, gpointer data)
{
 if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button)))
 {
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button3)))
  {
   gamet = 1;
   gtk_main_quit();
  }
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button4)))
  {
   gamet = 2;
   gtk_main_quit();
  }
  if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button5)))
  {
   gamet = 3;
   gtk_main_quit();
  } 
 }
 if(gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button2)))
 {
  gamet = 4;
  gtk_main_quit();
 }
}
#endif
The error I get when I try to compile this is:
connect4menu2.h: In member function 'void menu::gui()':
connect4menu2.h:46: error: invalid use of member (did you forget the '&' ?)
connect4menu2.h:96: error: invalid use of member (did you forget the '&' ?)
I cannot understand why I can't call startGame and deleteEvent from gui.
Does anybody know why I am getting this error