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example/ex-dict04.c

@@ -5,14 +5,23 @@
 /* program that reads text from standard-input, 
    and prints the total number of distinct words found in the text. 
 */
+
+/* Definition of a set (hashset) of unique string_t */
 DICT_SET_DEF(dict_str, string_t, STRING_OPLIST)
 
 int main(void)
 {
+  // Define word as a string_t
   M_LET(word, STRING_OPLIST)
-    M_LET(wordcount, DICT_SET_OPLIST(dict_str, STRING_OPLIST)) {
-    while (string_fget_word(word, " \t\n,.!;:?", stdin))
+  // Define wordcount as a set of string_t
+  M_LET(wordcount, DICT_SET_OPLIST(dict_str, STRING_OPLIST)) {
+    // Read a word from the standard input
+    while (string_fget_word(word, " \t\n,.!;:?", stdin)) {
+      // Push this word in the set.
+      // Do nothing if it already exists.
       dict_str_push(wordcount, word);
+    }
+    // Print the number of words of the standard input.
     printf ("Words: %zu\n", dict_str_size(wordcount));
   }
 }