diff --git a/Uebung 2/2.1/ExtendedBinaryTree.cpp b/Uebung 2/2.1/ExtendedBinaryTree.cpp
index 1de58e6..db443a2 100644
--- a/Uebung 2/2.1/ExtendedBinaryTree.cpp	
+++ b/Uebung 2/2.1/ExtendedBinaryTree.cpp	
@@ -46,7 +46,7 @@ ExtendedBinaryTree::findMax(ExtendedBinaryTreeNode *node) {
 // (sub)tree
 std::string ExtendedBinaryTree::printPreorder(ExtendedBinaryTreeNode *node) {
   std::stringstream output;
-  output << node->key << std::endl;
+  output << *(node->key) << std::endl;
 
   if (node->left != nullptr) {
     output << this->printPreorder(node->left);
@@ -59,4 +59,39 @@ std::string ExtendedBinaryTree::printPreorder(ExtendedBinaryTreeNode *node) {
 
 std::string ExtendedBinaryTree::printPreorder() {
   return this->printPreorder(this->rootNode);
+}
+
+std::string ExtendedBinaryTree::printPostorder() {
+  return this->printPostorder(this->rootNode);
+}
+
+std::string ExtendedBinaryTree::printPostorder(ExtendedBinaryTreeNode *node) {
+  std::stringstream output;
+
+  if (node->left != nullptr) {
+    output << this->printPreorder(node->left);
+  }
+  if (node->right != nullptr) {
+    output << this->printPreorder(node->right);
+  }
+  output << *(node->key) << std::endl;
+  return output.str();
+}
+
+std::string ExtendedBinaryTree::printInorder() {
+  return this->printInorder(this->rootNode);
+}
+
+std::string ExtendedBinaryTree::printInorder(ExtendedBinaryTreeNode *node) {
+  std::stringstream output;
+
+  if (node->left != nullptr) {
+    output << this->printPreorder(node->left);
+  }
+  output << *(node->key) << std::endl;
+
+  if (node->right != nullptr) {
+    output << this->printPreorder(node->right);
+  }
+  return output.str();
 }
\ No newline at end of file
diff --git a/Uebung 2/2.1/ExtendedBinaryTree.h b/Uebung 2/2.1/ExtendedBinaryTree.h
index e7f95d8..e97f3fa 100644
--- a/Uebung 2/2.1/ExtendedBinaryTree.h	
+++ b/Uebung 2/2.1/ExtendedBinaryTree.h	
@@ -17,6 +17,10 @@ public:
   ExtendedBinaryTreeNode *findMax(ExtendedBinaryTreeNode *node);
   std::string printPreorder(ExtendedBinaryTreeNode *node);
   std::string printPreorder();
+  std::string printPostorder(ExtendedBinaryTreeNode *node);
+  std::string printPostorder();
+  std::string printInorder(ExtendedBinaryTreeNode *node);
+  std::string printInorder();
 };
 
 // std::string printPreorder(BinaryTreeNode* node);