13.3

Author: ottojo

13/Aufgabe3/src/Node.java

@@ -0,0 +1,9 @@
+public class Node {
+    Node left;
+    Node right;
+    int val;
+
+    public int sum() {
+        return (left != null ? left.sum() : 0) + (right != null ? right.sum() : 0) + val;
+    }
+}

13/Aufgabe3/src/Tree.java

@@ -0,0 +1,7 @@
+public class Tree {
+    private Node root;
+
+    public int sum() {
+        return root != null ? root.sum() : 0;
+    }
+}