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书写错误,null写成了nullptr
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@ -51,7 +51,7 @@ TreeNode* deleteNode(TreeNode* root, int key)
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遇到空返回,其实这也说明没找到删除的节点,遍历到空节点直接返回了
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遇到空返回,其实这也说明没找到删除的节点,遍历到空节点直接返回了
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```
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```
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if (root == nullptr) return root;
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if (root == null) return root;
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```
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```
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* 确定单层递归的逻辑
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* 确定单层递归的逻辑
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