Update basics.md

doc/basics.md

@@ -567,7 +567,7 @@ support for users who avoid exceptions. See [the simdjson error handling documen
   auto json = R"( { "test":{ "val1":1, "val2":2 } }   )"_padded;
   auto doc = parser.iterate(json);
   size_t count = doc.count_fields(); // requires simdjson 1.0 or better
-  std::cout << "Number of fields: " <<  new_count << std::endl; // Prints "Number of fields: 1"
+  std::cout << "Number of fields: " <<  count << std::endl; // Prints "Number of fields: 1"
   ```
   Similarly to `count_elements`, you should not let an object instance go out of scope before consuming it after calling
   the `count_fields` method. If you access an object inside a document, you can use the `count_fields` method as follow.