diff --git a/src/NetHack_3.7/src/drawing.c b/src/NetHack_3.7/src/drawing.c
index 4db886a..71e16bd 100644
--- a/src/NetHack_3.7/src/drawing.c
+++ b/src/NetHack_3.7/src/drawing.c
@@ -97,38 +97,49 @@ const uchar def_r_oc_syms[MAXOCLASSES] = {
  * recognized, then MAXOCLASSES is returned.  Used in detect.c, invent.c,
  * objnam.c, options.c, pickup.c, sp_lev.c, lev_main.c, and tilemap.c.
  */
-int
-def_char_to_objclass(char ch)
+int def_char_to_objclass(char ch)
 {
     int i;
 
-    for (i = 1; i < MAXOCLASSES; i++)
+    // Iterate through the object classes
+    for (i = 1; i < MAXOCLASSES; i++) {
+        // Check if the character matches the symbol of the current object class
         if (ch == def_oc_syms[i].sym)
             break;
+    }
+    
+    // Return the index representing the object class if a match is found
+    // If no match is found, return MAXOCLASSES
     return i;
 }
 
+
 /*
  * Convert a character into a monster class.  This returns the _first_
  * match made.  If there are are no matches, return MAXMCLASSES.
  * Used in detect.c, options.c, read.c, sp_lev.c, and lev_main.c
  */
-int
-def_char_to_monclass(char ch)
+int def_char_to_monclass(char ch)
 {
     int i;
 
-    for (i = 1; i < MAXMCLASSES; i++)
+    // Iterate through the monster classes
+    for (i = 1; i < MAXMCLASSES; i++) {
+        // Check if the character matches the symbol of the current monster class
         if (ch == def_monsyms[i].sym)
             break;
+    }
+    
+    // Return the index representing the monster class if a match is found
+    // If no match is found, return MAXMCLASSES
     return i;
 }
 
+
 /* does 'ch' represent a furniture character?  returns index into defsyms[] */
-int
-def_char_is_furniture(char ch)
+int def_char_is_furniture(char ch)
 {
-    /* note: these refer to defsyms[] order which is much different from
+    /* Note: these refer to defsyms[] order which is much different from
        levl[][].typ order but both keep furniture in a contiguous block */
     static const char first_furniture[] = "stair", /* "staircase up" */
                       last_furniture[] = "fountain";
@@ -137,17 +148,22 @@ def_char_is_furniture(char ch)
 
     for (i = 0; i < MAXPCHARS; ++i) {
         if (!furniture) {
+            // Check if the current explanation matches the start of furniture
             if (!strncmp(defsyms[i].explanation, first_furniture, 5))
                 furniture = TRUE;
         }
         if (furniture) {
+            // If the current symbol matches the input character, return the index
             if (defsyms[i].sym == (uchar) ch)
                 return i;
+            // If the current explanation matches the end of furniture, break the loop
             if (!strcmp(defsyms[i].explanation, last_furniture))
                 break; /* reached last furniture */
         }
     }
+    // If no match is found, return -1
     return -1;
 }
 
+
 /*drawing.c*/