diff --git a/tech/C++.wiki b/tech/C++.wiki
index f6d8a8c..7788cf8 100644
--- a/tech/C++.wiki
+++ b/tech/C++.wiki
@@ -8,6 +8,14 @@ drawbacks due to the Object abstraction.
 * [[constexpr]]
 * [[inline_static_member|inline static members]]
 
+== Common operators ==
+
+=== Distance between two enumerators ===
+
+To find the distance between two enumerators, use `std::distance`.
+It is from the `<iterator>` header.
+
+
 == Also See ==
 
 [[C]]