Add debugging of arrow paths

Add debugging statements that print out the location of the arrow and
the rooms it is supposed to move to.  The statements use conditional
compiling using the DEBUG macro.

diff --git a/wumpus.c b/wumpus.c
index 2adc696d8179cc80d44252a4f5f6eba73d01e469..0bb6315bccfb3f4360ea3c828d679f51d2888401 100644 (file)
--- a/wumpus.c
+++ b/wumpus.c
@@ -334,6 +334,11 @@ badrange:
     {
        int     k1;
 
+#ifdef DEBUG
+       (void) printf("Location is %d, looking for tunnel to room %d\n",
+                     scratchloc+1, path[k]+1);
+#endif
+
        /* 810 FOR K1=1 TO 3                                            */
        for (k1 = 0; k1 < 3; k1++)
        {
@@ -351,13 +356,16 @@ badrange:
                 */
                scratchloc = path[k];
 
+#ifdef DEBUG
+               (void) printf("Found tunnel to room %d\n", scratchloc+1);
+#endif
+
                /* this simulates logic at 895 in the BASIC code */
                check_shot();
                if (finished != NOT)
                    return;
                goto nextpath;
            }
-
            /* 820 NEXT K1                                              */
        }
 
@@ -365,6 +373,11 @@ badrange:
        /* 830 L=S(L,FNB(1))                                            */
        scratchloc = cave[scratchloc][FNB()];
 
+#ifdef DEBUG
+       (void) printf("No tunnel for room %d, new location is %d\n",
+                     path[k]+1, scratchloc+1);
+#endif
+
        /* 835 GOTO 900                                                 */
        check_shot();
        if (finished != NOT)
@@ -433,6 +446,10 @@ void move_wumpus()
     if (k < 3)
        loc[WUMPUS] = cave[loc[WUMPUS]][k];
 
+#ifdef DEBUG
+    (void) printf("Wumpus location is now room %d\n", loc[WUMPUS]+1);
+#endif
+
     /* 955 IF L(2)<>L THEN 970                                         */
     if (loc[WUMPUS] != loc[YOU])
        return;