二叉搜索树

CMakeLists.txt

@@ -3,4 +3,4 @@ project(demo)
 
 set(CMAKE_CXX_STANDARD 11)
 
-add_executable(demo HashTable.cpp)
+add_executable(demo SearchTree.cpp)

HashTable.cpp

@@ -15,7 +15,7 @@ struct node_base {
 template <class T, class T1>
 class List {
 public:
-    List(size_t l = 10)
+    explicit List(size_t l = 10)
     : node(new node_base<T>()), last(node), len(l), size(0) {
         node_base<T>* for_old = nullptr;
         node_base<T>* current = last;
@@ -86,6 +86,9 @@ public:
         }
     }
     virtual ~HashMap() {
+        for (int i = 0; i < size; ++i) {
+            delete table[i];
+        }
         delete table;
     }
 public:

SearchTree.cpp

@@ -0,0 +1,139 @@
+//
+// Created by Administrator on 2023/7/19.
+//
+
+#include <list>
+#include <cstdio>
+#include <vector>
+
+/**
+ *  二叉搜索树 左子树 永远比跟小 右子树 永远比根大
+ *  搜索时与根与比较时左走右走
+ */
+
+template <class T>
+struct tree_node {
+    tree_node* left = nullptr;
+    tree_node* right = nullptr;
+    std::list<T> data;
+};
+
+template <class T>
+class SearchTree {
+public:
+    explicit SearchTree(size_t len = 30)
+    : root_node(new tree_node<T>()), size(0) {
+        for (int i = 0; i < len; ++i) {
+            node_barrel.push_back(new tree_node<T>());
+        }
+    }
+    virtual ~SearchTree() {
+        for (const auto &item: node_barrel) {
+            delete item;
+        }
+        delete root_node;
+    }
+
+public:
+    void insert(T data) {
+        // 无可用节点
+        if (size >= node_barrel.size() + 1) {
+            for (int i = 0; i < node_barrel.size(); ++i) {
+                node_barrel.push_back(new tree_node<T>());
+            }
+        }
+
+        tree_node<T>* current = root_node;
+        while (current != nullptr) {
+            // 判断树节点是否有值
+            if (current->data.empty()) {
+                current->data.push_back(data);
+                return;
+            }
+            // 值一致
+            else if (current->data.front() == data){
+                current->data.push_back(data);
+                return;
+            }
+            // 值小
+            else if (current->data.front() > data) {
+                // 判断相应节点是否存在
+                if (current->left == nullptr) {
+                    // 连接新节点
+                    current->left = node_barrel[size++];
+                    current->left->data.push_back(data);
+
+                    return;
+                } else {
+                    current = current->left;
+                }
+            }
+            // 值大
+            else if (current->data.front() < data) {
+                // 判断相应节点是否存在
+                if (current->right == nullptr) {
+                    // 连接新节点
+                    current->right = node_barrel[size++];
+                    current->right->data.push_back(data);
+                    return;
+                } else {
+                    current = current->right;
+                }
+            }
+        }
+    }
+
+
+    tree_node<T>* find(T data) {
+        tree_node<T>* current = root_node;
+        while (current != nullptr) {
+            if (current->data.front() == data) {
+                return current;
+            }
+            else if(current->data.front() > data) {
+                current = current->left;
+            }
+            else if(current->data.front() < data) {
+                current = current->right;
+            }
+        }
+
+        return nullptr;
+    }
+
+    void erase(T data) {
+
+    }
+
+    void update(T old_data, T new_data) {
+
+    }
+
+    const std::vector<tree_node<T> *> &nodeBarrel() const {
+        return node_barrel;
+    }
+
+private:
+    // 根节点
+    tree_node<T>* root_node;
+    // 节点桶
+    std::vector<tree_node<T> *> node_barrel;
+    // 有效节点大小
+    size_t size;
+};
+
+
+int main() {
+    SearchTree<int> searchTree;
+    searchTree.insert(30);
+    searchTree.insert(1);
+    searchTree.insert(50);
+    searchTree.insert(5);
+    searchTree.insert(150);
+    searchTree.insert(15);
+    searchTree.insert(5);
+    auto node = searchTree.find(5);
+    for (const auto &item: node->data) {
+        printf("%d ", item);
+    }
+}