/* CD Application graphical user interface using Gnome/Gtk+ */#include <stdio.h>#include <stdlib.h>#include "app_gnome.h"/* Need to reference username and password entry boxes from   interface.c */extern GtkWidget *username_entry;extern GtkWidget *password_entry;gint main(gint argc, gchar *argv[]){  GtkWidget *login_dialog;   const char *user_const;  const char *pass_const;  gchar username[100];  gchar password[100];   gint result;      gnome_program_init ("CdDatabase", "0.1", LIBGNOMEUI_MODULE,                      argc, argv,                      GNOME_PARAM_APP_DATADIR, "",                      NULL);  GtkWidget *main_window = create_main_window();  gtk_widget_show_all(main_window);  /* Must login to database before we start, so create dialog to     input username and password */  login_dialog = create_login_dialog();   while (1)  {       result = gtk_dialog_run (GTK_DIALOG (login_dialog));    /* If we click cancel, then confirm exit */    if (result != GTK_RESPONSE_ACCEPT)    {      if (confirm_exit())        return 0;      else        continue;    }    /* Retrieve username and password */    user_const = gtk_entry_get_text(GTK_ENTRY (username_entry));    pass_const = gtk_entry_get_text(GTK_ENTRY (password_entry));    strcpy(username, user_const);    strcpy(password, pass_const);        if (database_start(username, password) == TRUE)      break;    /* If we couldn't logon, then display error message and try again */    GtkWidget * error_dialog = gtk_message_dialog_new (GTK_WINDOW(main_window),                                  GTK_DIALOG_DESTROY_WITH_PARENT,                                  GTK_MESSAGE_ERROR,                                  GTK_BUTTONS_CLOSE,                                  "Could not log on! - Check Username and Password");    gtk_dialog_run (GTK_DIALOG (error_dialog));    gtk_widget_destroy (error_dialog);  }    gtk_widget_destroy (login_dialog);  gtk_main();   return 0;}