-extern char randomize; /* -x, give first available ship */
-extern char longfmt; /* -l, print score in long format */
-extern char nobells; /* -b, don't ring bell before Signal */
+extern int randomize; /* -x, give first available ship */
+extern int longfmt; /* -l, print score in long format */
+extern int nobells; /* -b, don't ring bell before Signal */