(process:1218): Gtk-WARNING **: Locale not supported by C library.
	Using the fallback 'C' locale.

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

(a.out:1218): GLib-GObject-WARNING **: invalid cast from `GtkButton' to `GtkTable'

(a.out:1218): Gtk-CRITICAL **: IA__gtk_table_attach: assertion `GTK_IS_TABLE (table)' failed

 void display_stuff ( int argc, char *argv[])
{
  gtk_init (&argc, &argv);

  GtkWidget *window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  GtkWidget *table;
  GtkWidget *xlabel, *ylabel;
  GtkWidget *button[8];

  table = gtk_table_new ( 3, 3, TRUE);

  gint x;

  gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
  gtk_window_set_default_size(GTK_WINDOW(window), 600, 600);
  gtk_window_set_title (GTK_WINDOW(window), "Tic-Tac-Toe");
  gtk_container_set_border_width(GTK_CONTAINER(window), 5);

  gtk_table_set_row_spacings(GTK_TABLE(table), 10);
  gtk_table_set_col_spacings(GTK_TABLE(table), 10);

  for (x=0; x<=8; x++) {
   button[x] = gtk_button_new();
   g_object_set_data (G_OBJECT (button[x]), "current_pos", (gpointer) x);
   gtk_button_set_relief (GTK_BUTTON (button[x]), GTK_RELIEF_HALF);
  }

  gtk_table_attach_defaults (GTK_TABLE(table), button[(gint)0], 0, 1, 0, 1 );
  gtk_table_attach_defaults (GTK_TABLE(table), button[(gint)1], 1, 2, 0, 1 );
  gtk_table_attach_defaults (GTK_TABLE(table), button[(gint)2], 2, 3, 0, 1 );

  gtk_table_attach_defaults (GTK_TABLE(table), button[3], 0, 1, 1, 2 );
  gtk_table_attach_defaults (GTK_TABLE(table), button[4], 1, 2, 1, 2 );
  gtk_table_attach_defaults (GTK_TABLE(table), button[5], 2, 3, 1, 2 );

  gtk_table_attach_defaults (GTK_TABLE(table), button[6], 0, 1, 2, 3 );
  gtk_table_attach_defaults (GTK_TABLE(table), button[7], 1, 2, 2, 3 );
  gtk_table_attach_defaults (GTK_TABLE(table), button[8], 2, 3, 2, 3 );

  gtk_container_add(GTK_CONTAINER(window), table);

  choose_first ();

  for (x=0; x <= 8; x++)
   g_signal_connect(G_OBJECT(button[x]), "clicked", G_CALLBACK(on_button_clicked), (gpointer)x);

  g_signal_connect_swapped(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), G_OBJECT(window));

  gtk_widget_show_all(window);

}