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| #include <iostream>
template <typename K, typename V>
class binarySearchTree
{
private:
struct node;
void clear_(node*);
node* root;
size_t count;
public:
binarySearchTree( node* root_ = nullptr, const size_t& cnt = 0) : root(root_), count(cnt){}
~binarySearchTree();
binarySearchTree(const binarySearchTree&);
binarySearchTree& operator=(const binarySearchTree&);
node* insert(const K&, const V&);
void remove(const K&);
V search(const K&);
void inOrderTraversal(node*);
void preOrderTraversal(node*);
void postOrderTraversal(node*);
node* getRoot();
V getMax(node*) const;
V getMin(node*) const;
};
template <typename K, typename V>
struct binarySearchTree<K, V>::node
{
K key;
V value;
node* left, *right, *parent;
binarySearchTree* host;
node(const K& key_ = K(), const V& value_ = V(), node* left_ = nullptr, node* right_ = nullptr, node* parent_ = nullptr, binarySearchTree* bts = nullptr) :
key(key_), value(value_), left(left_), right(right_), parent(parent_), host(bts){}
~node(){}
node* insert_(const K&, const V&);
void remove_(const K&);
V search_(const K&);
};
template <typename K, typename V>
typename binarySearchTree<K, V>::node* binarySearchTree<K, V>::node::insert_(const K& nkey, const V& nval)
{
if(nkey > key)
{
if(right != nullptr) right -> insert_(nkey, nval);
else return right = new node(nkey, nval, nullptr, nullptr, this, host);
} else if(nkey < key)
{
if(left != nullptr) left -> insert_(nkey, nval);
else return left = new node(nkey, nval, nullptr, nullptr, this, host);
} else
{
key = nkey;
value = nval;
return this;
}
}
template <typename K, typename V>
void binarySearchTree<K, V>::node::remove_(const K& nkey)
{
if(nkey > key)
{
if(right != nullptr) right -> remove_(nkey);
else throw std::string("No element");
} else if(nkey < key)
{
if(left != nullptr) left -> remove_(nkey);
else throw std::string("No element");
} else
{
if(left == nullptr && right == nullptr)
{
if(parent == nullptr)
{
host -> root = nullptr;
} else if(parent -> left && parent -> left -> key == nkey)
{
parent -> left = nullptr;
} else if(parent -> right && parent -> right -> key == nkey)
{
parent -> right = nullptr;
}
} else if(left != nullptr && right == nullptr)
{
if(parent == nullptr)
{
host -> root = left;
} else if(parent -> left && parent -> left -> key == nkey)
{
parent -> left = left;
} else if(parent -> right && parent -> right -> key == nkey)
{
parent -> right = left;
}
left -> parent = parent;
} else if(left == nullptr && right != nullptr)
{
if(parent == nullptr)
{
host -> root = right;
} else if(parent -> left && parent -> left -> key == nkey)
{
parent -> left = right;
} else if(parent -> right && parent -> right -> key == nkey)
{
parent -> right = right;
}
right -> parent = parent;
} else
{
if(right -> left == nullptr)
{
right -> parent = parent;
right -> left = left;
left -> parent = right;
if(parent == nullptr) host -> root = right;
} else
{
node* lastLeft = right;
while(lastLeft -> left)
{
lastLeft = lastLeft -> left;
}
lastLeft -> parent -> left = nullptr;
lastLeft -> left = left;
lastLeft -> right = right;
lastLeft -> parent = parent;
if(parent == nullptr) host -> root = lastLeft;
}
}
delete this;
}
}
template <typename K, typename V>
V binarySearchTree<K, V>::node::search_(const K& nkey)
{
if(nkey > key)
{
if (right != nullptr) return right -> search_(nkey);
else throw std::string("No element");
} else if(nkey < key)
{
if (left != nullptr) return left -> search_(nkey);
else throw std::string("No element");
} else
{
return value;
}
}
template <typename K, typename V>
binarySearchTree<K, V>::~binarySearchTree()
{
if(root != nullptr)
{
clear_(root);
}
root = nullptr;
count = 0;
}
template <typename K, typename V>
void binarySearchTree<K, V>::clear_(node* nd)
{
if(nd != nullptr)
{
if(nd -> left != nullptr) clear_(nd -> left);
if(nd -> right != nullptr) clear_(nd -> right);
delete nd;
}
}
template <typename K, typename V>
typename binarySearchTree<K, V>::node* binarySearchTree<K, V>::insert(const K& nkey, const V& nval)
{
if(root == nullptr)
{
root = new node(nkey, nval, nullptr, nullptr, nullptr, this);
return root;
}
return root -> insert_(nkey, nval);
}
template <typename K, typename V>
void binarySearchTree<K, V>::remove(const K& nkey)
{
if(root == nullptr)
{
return;
}
root -> remove_(nkey);
}
template <typename K, typename V>
V binarySearchTree<K, V>::search(const K& nkey)
{
if(root == nullptr)
{
throw std::string("No element");
}
return root -> search_(nkey);
}
template <typename K, typename V>
void binarySearchTree<K, V>::inOrderTraversal(binarySearchTree<K, V>::node* nd)
{
if (nd != nullptr)
{
inOrderTraversal(nd -> left);
std::cout<<nd -> value<<" ";
inOrderTraversal(nd -> right);
}
std::cout<<std::endl;
}
template <typename K, typename V>
void binarySearchTree<K, V>::preOrderTraversal(binarySearchTree<K, V>::node* nd)
{
if (nd != nullptr)
{
std::cout<<nd -> value<<" ";
inOrderTraversal(nd -> left);
inOrderTraversal(nd -> right);
}
std::cout<<std::endl;
}
template <typename K, typename V>
void binarySearchTree<K, V>::postOrderTraversal(node* nd)
{
if (nd != nullptr)
{
inOrderTraversal(nd -> left);
inOrderTraversal(nd -> right);
std::cout<<nd -> value<<" ";
}
std::cout<<std::endl;
}
template <typename K, typename V>
typename binarySearchTree<K, V>::node* binarySearchTree<K, V>::getRoot()
{
return root;
}
template <typename K, typename V>
V binarySearchTree<K, V>::getMin(node *nd) const
{
if (nd -> left == nullptr)
{
return nd -> value;
}
return getMin(nd -> left);
}
template <typename K, typename V>
V binarySearchTree<K, V>::getMax(node *nd) const
{
if (nd -> right == nullptr)
{
return nd -> value;
}
return getMax(nd -> right);
} |
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Сообщение от Peoples
