C++智能指针分配树节点

Question

请教一下，一个全用make_shared智能指针分配Node节点的二叉树，销毁树时直接把root节点赋值为nullptr，这棵树可不可以被安全回收？

Answer 1

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

Answer 2

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

Answer 3

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

Answer 4

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