--- a/xrogue/io.c	Fri Feb 19 21:02:28 2016 -0500
+++ b/xrogue/io.c	Wed Mar 02 21:13:26 2016 -0500
@@ -22,6 +22,8 @@
 #include <string.h>
 #include "rogue.h"
 
+void doadd(char *fmt, va_list ap);
+
 /*
  * msg:
  *      Display a message at the top of the screen.
@@ -77,7 +79,8 @@
  * player with the --More-- string.  Then erase the message.
  */
 
-rmmsg()
+void
+rmmsg(void)
 {
     if (mpos) {
         wclear(msgw);
@@ -96,7 +99,8 @@
  * is up there with the --More--)
  */
 
-endmsg()
+void
+endmsg(void)
 {
     /* Needed to track where we are for 5.0 (PC) curses */
     register int x, y;
@@ -141,6 +145,7 @@
     draw(msgw);
 }
 
+void
 doadd(char *fmt, va_list ap)
 {
     vsprintf((char *) &msgbuf[newpos], fmt, ap);
@@ -153,9 +158,8 @@
  *      flgptr will be NULL if we don't know what the monster is yet!
  */
 
-step_ok(y, x, can_on_monst, flgptr)
-register int y, x, can_on_monst;
-register struct thing *flgptr;
+bool
+step_ok(int y, int x, int can_on_monst, struct thing *flgptr)
 {
     /* can_on_monst = MONSTOK if all we care about are physical obstacles */
     register struct linked_list *item;
@@ -222,6 +226,7 @@
  *      returns true if it is ok for type to shoot over ch
  */
 
+bool
 shoot_ok(int ch)
 {
     switch (ch)
@@ -240,10 +245,11 @@
 /*
  * status:
  *      Display the important stats line.  Keep the cursor where it was.
+ * display: is TRUE, display unconditionally
  */
 
-status(display)
-bool display;   /* is TRUE, display unconditionally */
+void
+status(bool display)
 {
     register struct stats *stat_ptr, *max_ptr;
     register int oy = 0, ox = 0, temp;
@@ -377,8 +383,8 @@
  *      Sit around until the guy types the right key
  */
 
-wait_for(ch)
-register char ch;
+void
+wait_for(char ch)
 {
     register char c;
 
@@ -407,10 +413,9 @@
  *      typed and then redraw the starting screen.
  */
 
-over_win(oldwin, newin, maxy, maxx, cursory, cursorx, redraw)
-WINDOW *oldwin, *newin;
-int maxy, maxx, cursory, cursorx;
-char redraw;
+void
+over_win(WINDOW *oldwin, WINDOW *newin, int maxy, int maxx, int cursory, 
+         int cursorx, char redraw)
 {
     char blanks[LINELEN+1];
     register int line, i;
@@ -460,9 +465,8 @@
  *      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);
@@ -477,9 +481,8 @@
  *      Displays message on bottom line and waits for a space to return
  */
 
-dbotline(scr,message)
-WINDOW *scr;
-char *message;
+void
+dbotline(WINDOW *scr, char *message)
 {
         mvwaddstr(scr,lines-1,0,message);
         draw(scr);
@@ -491,8 +494,8 @@
  *      Restores the screen to the terminal
  */
 
-restscr(scr)
-WINDOW *scr;
+void
+restscr(WINDOW *scr)
 {
         clearok(scr,TRUE);
         touchwin(scr);
@@ -506,10 +509,7 @@
  */
 
 unsigned long
-netread(error, size, stream)
-int *error;
-int size;
-FILE *stream;
+netread(int *error, int size, FILE *stream)
 {
     unsigned long result = 0L,  /* What we read in */
                   partial;      /* Partial value */
@@ -542,12 +542,13 @@
 /*
  * netwrite:
  *      Write out a byte, short, or long machine independently.
+ * value: What to write
+ * size: How much to write out
+ * stream: Where to write it
  */
 
-netwrite(value, size, stream)
-unsigned long value;    /* What to write */
-int size;       /* How much to write out */
-FILE *stream;   /* Where to write it */
+int
+netwrite(unsigned long value, int size, FILE *stream)
 {
     int i;      /* Goes through value one byte at a time */
     char outc;  /* The next character to be written */