0_0_39825341_7469\Main.java:10: 错误: 需要class, interface或enum
public void postorderTraversal(TreeNode root) {
^
0_0_39825341_7469\Main.java:12: 错误: 需要class, interface或enum
postorderTraversal(root.left);
^
0_0_39825341_7469\Main.java:13: 错误: 需要class, interface或enum
postorderTraversal(root.right);
^
0_0_39825341_7469\Main.java:14: 错误: 需要class, interface或enum
System.out.print(root.val + " ");
^
0_0_39825341_7469\Main.java:15: 错误: 需要class, interface或enum
}
^
0_0_39825341_7469\Main.java:16: 错误: 需要class, interface或enum
public static void main(String[] args) {
^
0_0_39825341_7469\Main.java:19: 错误: 需要class, interface或enum
root.left = new TreeNode(2);
^
0_0_39825341_7469\Main.java:20: 错误: 需要class, interface或enum
root.right = new TreeNode(3);
^
0_0_39825341_7469\Main.java:21: 错误: 需要class, interface或enum
root.left.left = new TreeNode(4);
^
0_0_39825341_7469\Main.java:22: 错误: 需要class, interface或enum
root.left.right = new TreeNode(5);
^
0_0_39825341_7469\Main.java:24: 错误: 需要class, interface或enum
BinaryTreeTraversal traversal = new BinaryTreeTraversal();
^
0_0_39825341_7469\Main.java:26: 错误: 需要class, interface或enum
System.out.println("Preorder Traversal:");
^
0_0_39825341_7469\Main.java:27: 错误: 需要class, interface或enum
traversal.preorderTraversal(root);
^
0_0_39825341_7469\Main.java:28: 错误: 需要class, interface或enum
System.out.println("\nInorder Traversal:");
^
0_0_39825341_7469\Main.java:29: 错误: 需要class, interface或enum
traversal.inorderTraversal(root);
^
0_0_39825341_7469\Main.java:30: 错误: 需要class, interface或enum
System.out.println("\nPostorder Traversal:");
^
0_0_39825341_7469\Main.java:31: 错误: 需要class, interface或enum
traversal.postorderTraversal(root);
^
0_0_39825341_7469\Main.java:32: 错误: 需要class, interface或enum
}
^
18 个错误
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