--- a/rogue4/things.c	Fri Feb 26 17:30:30 2016 -0500
+++ b/rogue4/things.c	Wed Mar 02 21:28:34 2016 -0500
@@ -16,6 +16,11 @@
 #include <string.h>
 #include "rogue.h"
 
+int pick_one(struct magic_item *magic, int nitems);
+void print_disc(char type);
+void set_order(short *order, int numthings);
+char *nothing(char type);
+
 bool got_genocide = FALSE;
 
 /*
@@ -24,9 +29,7 @@
  *	inventory.
  */
 char *
-inv_name(obj, drop)
-register THING *obj;
-register bool drop;
+inv_name(THING *obj, bool drop)
 {
     register char *pb;
 
@@ -163,7 +166,8 @@
  * drop:
  *	Put something down
  */
-drop()
+void
+drop(void)
 {
     register char ch;
     register THING *nobj, *op;
@@ -211,8 +215,8 @@
  * dropcheck:
  *	Do special checks for dropping or unweilding|unwearing|unringing
  */
-dropcheck(op)
-register THING *op;
+bool
+dropcheck(THING *op)
 {
     if (op == NULL)
 	return TRUE;
@@ -253,7 +257,7 @@
  *	Return a new thing
  */
 THING *
-new_thing()
+new_thing(void)
 {
     register THING *cur;
     register int j, k;
@@ -361,9 +365,8 @@
  * pick_one:
  *	Pick an item out of a list of nitems possible magic items
  */
-pick_one(magic, nitems)
-register struct magic_item *magic;
-int nitems;
+int
+pick_one(struct magic_item *magic, int nitems)
 {
     register struct magic_item *end;
     register int i;
@@ -398,7 +401,8 @@
 
 static char *lastfmt, *lastarg;
 
-discovered()
+void
+discovered(void)
 {
     register char ch;
     register bool disc_list;
@@ -456,8 +460,8 @@
 
 #define MAX(a,b,c,d)	(a > b ? (a > c ? (a > d ? a : d) : (c > d ? c : d)) : (b > c ? (b > d ? b : d) : (c > d ? c : d)))
 
-print_disc(type)
-char type;
+void
+print_disc(char type)
 {
     register bool *know = NULL;
     register char **guess = NULL;
@@ -508,9 +512,8 @@
  * set_order:
  *	Set up order for list
  */
-set_order(order, numthings)
-short *order;
-int numthings;
+void
+set_order(short *order, int numthings)
 {
     register int i, r, t;
 
@@ -591,8 +594,7 @@
  *	Set up prbuf so that message for "nothing found" is there
  */
 char *
-nothing(type)
-register char type;
+nothing(char type)
 {
     register char *sp, *tystr = NULL;