diff --git a/ZCppMain/ZtCObjAVL.H b/ZCppMain/ZtCObjAVL.H
index 214d6ec..d3fe2a4 100644
--- a/ZCppMain/ZtCObjAVL.H
+++ b/ZCppMain/ZtCObjAVL.H
@@ -2377,6 +2377,50 @@ namespace ZNsMain
             >
     class ZtCObjAVL /////////////////////////////////////////////////////////////////////*/
 
+
+    namespace ZNsExam
+    {
+
+        template<typename TDummy=void*> class ZtCExamAVL
+        {
+        public:
+
+            static void ShowDataInNode(int AI_Data)
+            {
+                cout<<"* Node Data : "<<AI_Data<<endl;
+            }/*
+            static void ShowDataInNode(int AI_Data)*/
+
+            static int Main(int AI_ArgCnt=0, const char* APP_ArgVal[]=0)
+            {
+                using namespace std    ;
+                using namespace ZNsMain;
+
+                ZtCObjAVL<int, int> VO_CObjAVL;
+
+                VO_CObjAVL.AddData(10);
+                VO_CObjAVL.AddData(20);
+                VO_CObjAVL.AddData(30);
+                VO_CObjAVL.AddData(40);
+                VO_CObjAVL.AddData(9 );
+
+                cout<<"# In Order"  <<endl; VO_CObjAVL.IterInOrder  (&ShowDataInNode);
+                cout<<"# Post Order"<<endl; VO_CObjAVL.IterPostOrder(&ShowDataInNode);
+                cout<<"# Pre Order" <<endl; VO_CObjAVL.IterPreOrder (&ShowDataInNode);
+
+                return 0;
+            }/*
+            static int Main(int AI_ArgCnt=0, const char* APP_ArgVal[]=0)*/
+
+
+        public:
+        };/*
+        template<typename TDummy=void*> class ZtCExamAVL*/
+
+    }/*
+    namespace ZNsExam*/
+
+
 }/*
 namespace ZNsMain */
 
@@ -2417,7 +2461,6 @@ namespace ZNsMain */
 #########################################################################################*/
 
 
-
 namespace ZNsMain
 {