--- a/xrogue/monsters.c	Fri Feb 19 21:02:28 2016 -0500
+++ b/xrogue/monsters.c	Wed Mar 02 21:13:26 2016 -0500
@@ -19,14 +19,15 @@
 #include <curses.h>
 #include <ctype.h>
 #include <string.h>
+#include <stdlib.h>
 #include "rogue.h"
 
 /*
  * Check_residue takes care of any effect of the monster 
  */
 
-check_residue(tp)
-register struct thing *tp;
+void
+check_residue(struct thing *tp)
 {
     /*
      * Take care of special abilities
@@ -70,13 +71,11 @@
 
 /*
  * Creat_mons creates the specified monster -- any if 0 
+ * person: where to create next to
  */
 
 bool
-creat_mons(person, monster, report)
-struct thing *person;   /* Where to create next to */
-short monster;
-bool report;
+creat_mons(struct thing *person, short monster, bool report)
 {
     struct linked_list *nitem;
     register struct thing *tp;
@@ -131,9 +130,7 @@
  */
 
 void
-genmonsters(least, treas)
-register int least;
-bool treas;
+genmonsters(int least, bool treas)
 {
     reg int i;
     reg struct room *rp = &rooms[0];
@@ -180,8 +177,7 @@
  */
 
 short
-id_monst(monster)
-register char monster;
+id_monst(char monster)
 {
     register short result;
 
@@ -215,11 +211,8 @@
  *      Pick a new monster and add it to the list
  */
 
-new_monster(item, type, cp, max_monster)
-struct linked_list *item;
-short type;
-coord *cp;
-bool max_monster;
+void
+new_monster(struct linked_list *item, short type, coord *cp, bool max_monster)
 {
     register struct thing *tp;
     register struct monster *mp;
@@ -428,8 +421,7 @@
  */
 
 short
-randmonster(wander, no_unique)
-register bool wander, no_unique;
+randmonster(bool wander, bool no_unique)
 {
     register int d, cur_level, range, i; 
 
@@ -491,8 +483,8 @@
  * to purchase something.
  */
 
-sell(tp)
-register struct thing *tp;
+void
+sell(struct thing *tp)
 {
     register struct linked_list *item, *seller;
     register struct linked_list *sellpack;
@@ -588,8 +580,7 @@
  */
 
 struct linked_list *
-wake_monster(y, x)
-int y, x;
+wake_monster(int y, int x)
 {
     register struct thing *tp;
     register struct linked_list *it;
@@ -786,7 +777,8 @@
  *      A wandering monster has awakened and is headed for the player
  */
 
-wanderer()
+void
+wanderer(void)
 {
     register int i;
     register struct room *hr = roomin(&hero);