NextTreeData erster versuch

bintree.c

@@ -66,12 +66,36 @@ TreeNode *addToTree(TreeNode *root, const void *data, size_t dataSize, CompareFc
 // push the top node and push all its left nodes.
 void *nextTreeData(TreeNode *root)
 {
-  if(root == NULL)
+    static StackNode *stack = NULL;
+
+    // Beim ersten Aufruf: ganzen linken Pfad pushen
+    if(root != NULL)
     {
-
-
+      while(root != NULL)
+      {
+        stack = push(stack, root);      // TreeNode auf den Stack
+        root = root->left;
+      }
     }
-  stackNode.top(root);
+
+    // Wenn Stack leer -> fertig
+    if(stack == NULL)
+      return NULL;
+
+    // Obersten Knoten holen
+    TreeNode *node = (TreeNode*) top(stack);
+    stack = pop(stack);
+
+    // Rechten Teilbaum absteigen
+    TreeNode *right = node->right;
+    while(right != NULL)
+    {
+      stack = push(stack, right);
+      right = right->left;
+    }
+
+    return node->data;
+
 }
 
 // Releases all memory resources (including data copies).

highscores.txt

@@ -1,2 +1,3 @@
 Silvana;9944
+hannes;9910
 player1;3999