#include <gtk/gtk.h>static gboolean release_resource( GtkWidget *widget,GdkEvent  *event,gpointer   data ){  gtk_main_quit ();  return FALSE;}int main( int   argc,          char *argv[] ){    GtkWidget *wnd;    GtkWidget *box1;    GtkWidget *box2;    GtkWidget *button;    GtkWidget *separator;    GSList *group;      gtk_init (&argc, &argv);              wnd = gtk_window_new(GTK_WINDOW_TOPLEVEL);    gtk_window_set_default_size(GTK_WINDOW(wnd),200,200);    gtk_window_set_title (GTK_WINDOW (wnd), "radio buttons");    gtk_container_set_border_width (GTK_CONTAINER (wnd), 0);    box1 = gtk_vbox_new (FALSE, 0);    gtk_container_add (GTK_CONTAINER (wnd), box1);    box2 = gtk_vbox_new (FALSE, 10);    gtk_container_set_border_width (GTK_CONTAINER (box2), 10);    gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);    button = gtk_radio_button_new_with_label (NULL, "radio button1");    gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);    group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));    button = gtk_radio_button_new_with_label (group, "radio button2");    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);    gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);    group = gtk_radio_button_get_group (GTK_RADIO_BUTTON (button));    button = gtk_radio_button_new_with_label (group, "radio button3");    gtk_box_pack_start (GTK_BOX(box2), button, TRUE, TRUE, 0);    separator = gtk_hseparator_new ();    gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);    box2 = gtk_vbox_new (FALSE, 10);    gtk_container_set_border_width (GTK_CONTAINER (box2), 10);    gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);    gtk_widget_show (box2);    button = gtk_check_button_new_with_label("check button1");    gtk_container_add(GTK_CONTAINER(box2),button);    button = gtk_check_button_new_with_label("check button2");    gtk_container_add(GTK_CONTAINER(box2),button);    button = gtk_check_button_new_with_label("check button3");    gtk_container_add(GTK_CONTAINER(wnd),button);    g_signal_connect(G_OBJECT (wnd), "delete_event",                      G_CALLBACK(release_resource),                      NULL);    gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);        gtk_widget_show_all(wnd);         gtk_main ();    return 0;}