#include <gtk/gtk.h>

void activate(GtkApplication *app, gpointer user_data)
{
  GtkWidget *window, *spinbutton;
  GtkAdjustment *adjustment;

  window = gtk_application_window_new(app);

  adjustment = gtk_adjustment_new(5, 0, 10, 1, 1, 0);
  spinbutton = gtk_spin_button_new(adjustment, 1, 0);
  gtk_container_add(GTK_CONTAINER(window), spinbutton);

  gtk_widget_show_all(window);
}

int main(int argc, char *argv[])
{
  GtkApplication *app;
  int status;

  app = gtk_application_new(NULL, G_APPLICATION_FLAGS_NONE);
  g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
  status = g_application_run(G_APPLICATION(app), argc, argv);
  g_object_unref(app);

  return status;
}