C++ 二叉搜索树(BST)的实现方法

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网站的支持!

以上是 C++ 二叉搜索树(BST)的实现方法 的全部内容, 来源链接: utcz.com/z/329543.html

回到顶部