C++ 二叉搜索树(BST)的实现方法
投稿:mrr
这篇文章主要介绍了C++ 二叉搜索树(BST)的实现方法,非常不错,具有参考借鉴价值,需要的的朋友参考下
废话不多说了,直接给大家贴代码了,具体代码如下所示:
class BST { public: struct Node { int key;//节点的key int value;//节点的value Node* left; Node *right; int N;//节点的叶子节点数目 Node(int _key, int _value, int _N) { key = _key; value = _value; N = _N; } }; BST(); ~BST(); void put(int key, int value); int get(int key); int deleteKey(int key); private: Node* _deleteKey(int key, Node *x); Node* _deleteMin(Node *x); int size(Node *x); int _get(int key, Node* x); Node * _put(int key, int value,Node *x); Node * min(Node *x); Node* root; }; inline int BST::size(Node * x) { if (x == nullptr)return 0; return x->N; } int BST::_get(int key, Node * x) { if (x == nullptr)return 0; if (x->key < key)_get(key, x->right); else if (x->key > key)_get(key, x->left); else { return x->value; } return 0; } BST::Node* BST::_put(int key, int value, Node * x) { if (x == nullptr) { Node *tmp = new Node(key, value, 1); return tmp; } if (x->key > key) { x->left=_put(key, value, x->left); } else if (x->key < key) { x->right=_put(key, value, x->right); } else x->key = key; x->N = size(x->left) + size(x->right) + 1; return x; } BST::Node* BST::min(Node * x) { if (x->left == nullptr)return x; return min(x->left); } BST::BST() { } BST::~BST() { } void BST::put(int key, int value) { root=_put(key, value, root); } int BST::get(int key) { return _get(key, root); } BST::Node* BST::_deleteKey(int key, Node * x) { if (x->key > key)x->left = _deleteKey(key, x->left); else if (x->key < key)x->right = _deleteKey(key, x->right); else { if (x->left == nullptr)return x->right; else if (x->right == nullptr)return x->left; else { Node *tmp = x; x = min(tmp->right); x->left = tmp->left; x->right = _deleteMin(tmp->right); } } x->N = size(x->left) + size(x->right) + 1; return x; } BST::Node* BST::_deleteMin(Node * x) { if (x->left == nullptr)return x->right; x->left = _deleteMin(x->left); x->N = size(x->left) + size(x->right) + 1; return x; } int BST::deleteKey(int key) { return _get(key, root); }
以上所述是小编给大家介绍的C++ 二叉搜索树(BST)的实现方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持!