diff --git a/btree.cpp b/btree.cpp
index e5d412c..c22c297 100644
--- a/btree.cpp
+++ b/btree.cpp
@@ -4,3 +4,23 @@
  */
 
 
+enum Order
+{
+  LT,
+  GT,
+  EQ
+};
+
+template <typename T>
+struct BinaryTree
+{
+  T value;
+  BinaryTree<T> *left, *right;
+  enum Order (*compare)(T, T);
+  ~BinaryTree()
+  {
+    delete left;
+    delete right;
+  }
+};
+