--- a/rogue4/io.c	Fri Feb 26 17:30:30 2016 -0500
+++ b/rogue4/io.c	Wed Mar 02 21:28:34 2016 -0500
@@ -16,6 +16,8 @@
 #include "rogue.h"
 #include <stdarg.h>
 
+void doadd(char *fmt, va_list ap);
+
 /*
  * msg:
  *	Display a message at the top of the screen.
@@ -23,6 +25,7 @@
 static char msgbuf[BUFSIZ];
 static int newpos = 0;
 
+void
 msg(char *fmt, ...)
 {
     va_list ap;
@@ -50,6 +53,7 @@
  *	Add things to the current message
  */
 
+void
 addmsg(char *fmt, ...)
 {
     va_list ap;
@@ -65,7 +69,8 @@
  *	if it is up there with the --More--)
  */
 
-endmsg()
+void
+endmsg(void)
 {
     if (save_msg)
     {
@@ -99,6 +104,7 @@
  *	Perform an add onto the message buffer
  */
 
+void
 doadd(char *fmt, va_list ap)
 {
     vsprintf(&msgbuf[newpos], fmt, ap);
@@ -109,7 +115,8 @@
  * step_ok:
  *	Returns true if it is ok to step on ch
  */
-step_ok(ch)
+bool
+step_ok(char ch)
 {
     switch (ch)
     {
@@ -127,8 +134,8 @@
  *	Flushes stdout so that screen is up to date and then returns
  *	getchar().
  */
-readcharw(win)
-WINDOW *win;
+int
+readcharw(WINDOW *win)
 {
     int ch;
 
@@ -143,14 +150,14 @@
     return(ch);
 }
 
-readchar()
+int
+readchar(void)
 {
     return( readcharw(stdscr) );
 }
 
 char *
-unctrol(ch)
-char ch;
+unctrol(char ch)
 {
     return( (char *) unctrl(ch) );
 }
@@ -159,7 +166,8 @@
  * status:
  *	Display the important stats line.  Keep the cursor where it was.
  */
-status()
+void
+status(void)
 {
     register int oy, ox, temp;
     static int hpwidth = 0, s_hungry;
@@ -215,15 +223,14 @@
 
 
 
-wait_for(ch)
-register char ch;
+void
+wait_for(char ch)
 {
     w_wait_for(stdscr, ch);
 }
 
-w_wait_for(win,ch)
-WINDOW *win;
-register char ch;
+void
+w_wait_for(WINDOW *win, char ch)
 {
     register char c;
 
@@ -239,9 +246,8 @@
  * show_win:
  *	Function used to display a window and wait before returning
  */
-show_win(scr, message)
-register WINDOW *scr;
-char *message;
+void
+show_win(WINDOW *scr, char *message)
 {
     mvwaddstr(scr, 0, 0, message);
     touchwin(scr);