--- a/srogue/chase.c	Thu Jan 28 18:55:47 2016 -0500
+++ b/srogue/chase.c	Sun Jan 31 13:45:07 2016 -0500
@@ -14,19 +14,24 @@
  * See the file LICENSE.TXT for full copyright and licensing information.
  */
 
+#include <stdlib.h>
 #include "rogue.h"
 #include "rogue.ext"
 
 #define FARAWAY	32767
 #define RDIST(a, b)	(DISTANCE((a)->y, (a)->x, (b).y, (b).x))
 
+int do_chase(struct linked_list *mon);
+int chase(struct thing *tp, struct coord *ee, bool runaway, bool dofight);
+
 struct coord ch_ret;	/* Where chasing takes you */
 
 /*
  * runners:
  *	Make all the running monsters move.
  */
-runners()
+void
+runners(void)
 {
 	reg struct thing *tp;
 	reg struct linked_list *mon,*nextmon;
@@ -54,8 +59,8 @@
  * do_chase:
  *	Make one thing chase another.
  */
-do_chase(mon)
-struct linked_list *mon;
+int
+do_chase(struct linked_list *mon)
 {
 	reg struct thing *th;
 	reg struct room *rer, *ree, *rxx;
@@ -241,10 +246,8 @@
  *	chasee.  Returns TRUE if we want to keep on chasing
  *	later FALSE if we reach the goal.
  */
-chase(tp, ee, runaway, dofight)
-struct thing *tp;
-struct coord *ee;
-bool runaway, dofight;
+int
+chase(struct thing *tp, struct coord *ee, bool runaway, bool dofight)
 {
 	reg int x, y, ch;
 	reg int dist, thisdist, closest;
@@ -385,9 +388,8 @@
  * runto:
  *	Set a monster running after something
  */
-runto(runner, spot)
-struct coord *runner;
-struct coord *spot;
+void
+runto(struct coord *runner, struct coord *spot)
 {
 	reg struct linked_list *item;
 	reg struct thing *tp;
@@ -409,8 +411,7 @@
  *	NULL means they aren't in any room.
  */
 struct room *
-roomin(cp)
-struct coord *cp;
+roomin(struct coord *cp)
 {
 	reg struct room *rp;
 
@@ -428,8 +429,7 @@
  *	Find the monster from his coordinates
  */
 struct linked_list *
-find_mons(y, x)
-int y, x;
+find_mons(int y, int x)
 {
 	reg struct linked_list *item;
 	reg struct thing *th;
@@ -447,8 +447,8 @@
  * diag_ok:
  *	Check to see if the move is legal if it is diagonal
  */
-diag_ok(sp, ep)
-struct coord *sp, *ep;
+bool
+diag_ok(struct coord *sp, struct coord *ep)
 {
 	if (ep->x == sp->x || ep->y == sp->y)
 		return TRUE;
@@ -462,8 +462,8 @@
  * cansee:
  *	returns true if the hero can see a certain coordinate.
  */
-cansee(y, x)
-int y, x;
+bool
+cansee(int y, int x)
 {
 	reg struct room *rer;
 	struct coord tp;