Update: Apply the not operator logic to avoid needing to literally specify it.

diff --git a/level_3/fake/c/private-make-operate_validate.c b/level_3/fake/c/private-make-operate_validate.c
index 18ebc153d93c7332ce41bd625741b6da8ff316ca..39bebf02ed6417eee9a7bc0d38be3ec6d93142e3 100644 (file)
--- a/level_3/fake/c/private-make-operate_validate.c
+++ b/level_3/fake/c/private-make-operate_validate.c
@@ -93,13 +93,13 @@ extern "C" {
 
     if (!name.used) return F_none;
 
-    if (!((uint16_t) (name.string[0] - 'a') < 26 || (uint16_t) (name.string[0] - 'A') < 26)) {
+    if ((uint16_t) (name.string[0] - 'a') > 25 && (uint16_t) (name.string[0] - 'A') > 25) {
       if (name.string[0] != '_') return F_false;
     }
 
     for (f_array_length_t i = 1; i < name.used; ++i) {
 
-      if (!((uint16_t) (name.string[i] - 'a') < 26 || (uint16_t) (name.string[i] - 'A') < 26 || (uint16_t) (name.string[i] - '0') < 10)) {
+      if ((uint16_t) (name.string[i] - 'a') > 25 && (uint16_t) (name.string[i] - 'A') > 25 && (uint16_t) (name.string[i] - '0') > 9) {
         if (name.string[i] != '_') return F_false;
       }
     } // for