-static void b_grabar_nodo(int id, char *data);
-static int b_ultimo_id();
-static char *b_leer_nodo(int id);
-static char *b_crear_nodo();
+static void b_grabar_nodo(INDICE *idx, int id, char *data);
+static int b_ultimo_id(INDICE *idx);
+static char *b_leer_nodo(INDICE *idx, int id);
+static char *b_crear_nodo(INDICE *idx, int *i);