c++二叉搜索树怎么实现
本篇内容主要讲解“c++二叉搜索树怎么实现”,感兴趣的朋友不妨来看看。本文介绍的方法操作简单快捷,实用性强。下面就让小编来带大家学习“c++二叉搜索树怎么实现”吧!
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// http://blog.csdn.net/fansongy/article/details/6798278/ #include#include using namespace std; typedef struct treenode { int data; struct treenode *left; struct treenode *right; }TREE_NODE;//节点 typedef struct Bstree { TREE_NODE* root; int size; }BSTREE;//二叉树 BSTREE* create_tree() //创建 { BSTREE* tree = new(BSTREE); tree->root = NULL; tree->size = 0; return tree; } TREE_NODE* create_node(int data) //创建节点 { TREE_NODE* node =new(TREE_NODE); node->data = data; node->left = NULL; node->right = NULL; } void insert(TREE_NODE* node, TREE_NODE** root) //插入一个节点到那个位置 { if(NULL == *root) { *root = node; } else { if(node->data > (*root)->data) { insert(node, & (*root)->right); } else { insert(node, &(*root)->left); } } } void PreOrderTraverse(TREE_NODE* root) //先序遍历 { if(root) { cout << root->data < left); PreOrderTraverse(root->right); } } void InOrderTraverse(TREE_NODE* root) //中序遍历 { if(root) { InOrderTraverse(root->left); cout << root->data < right); } } void PostOrderTraverse(TREE_NODE * root) //后序遍历 { if(root) { PostOrderTraverse(root->left); PostOrderTraverse(root->right); cout << root->data < root); (tree->size)++; } TREE_NODE** bstree_find(int data, TREE_NODE** root) //查找DATA 对应的位置 { if(NULL==*root) { return root; } if(data >(*root)->data) { return bstree_find(data,& (*root)->right); } else if(data < (*root)->data) { return bstree_find(data, & (*root)->left); } else { return root; } //下面是非递归查找*root if(NULL==*root) { return root; } TREE_NODE* temp = *root; while(temp && ( temp->data !=data )) { if(data > temp->data) { temp = temp->right; } else if(data < temp->data) { temp = temp->left; } if(temp) { return &temp; } else { return &temp; } } } void del_node(TREE_NODE* node) //删除 该节点 { delete(node); } bool bstree_erase(int data, BSTREE* tree) //树中 插入 传入的是地址 如果想修改 这一地址变量就要 根据地址的地址 修改 { TREE_NODE** node = bstree_find(data, & tree->root); if(*node) { TREE_NODE* temp = *node; if( ((*node)->right==NULL) &&((*node)->left==NULL))//如果为叶子节点 { *node = NULL; del_node(temp); --tree->size; } if(((*node)->right==NULL) &&((*node)->left!=NULL))//node的right为空 { *node = (*node)->left; del_node(temp); --tree->size; } else if(((*node)->right!=NULL) &&((*node)->left==NULL))//node的left为空 { *node = (*node)->right; del_node(temp); --tree->size; } //下面是左右子树都不为空 删除时任一种情况 最好用1 2 种 //node的左右都不为空将left中最大的数顶替已经删除的node if(((*node)->left != NULL) && ((*node)->right != NULL)) { TREE_NODE* s = (*node)->left; while(s->right) { temp=s; s=s->right; } (*node)->data = s->data; if(temp != *node) { temp->righ = s->left; } else { temp->left =s->left;//类似左子树 } del_node(s); --tree->size; } //node的左右都不为空将right中最小的数顶替已经删除的node if(((*node)->left != NULL) && ((*node)->right != NULL)) { TREE_NODE* s = (*node)->right; while(s->left) { temp=s; s=s->left; } (*node)->data = s->data; if(temp != *node) { temp->left = s->right; } else { temp->right =s->right;//类似右子树 } del_node(s); --tree->size; } //node的左右都不为空,直接将右边整体移动到左边最大值下面 if(((*node)->left != NULL) && ((*node)->right != NULL)) { TREE_NODE* s = (*node)->left; while(s->right) { s=s->right; } s->right = (*node)->right; *node = (*node)->left; del_node(s); --tree->size; } //node的左右都不为空,直接将左边边整体移动到右边最小值下面 if(((*node)->left != NULL) && ((*node)->right != NULL)) { TREE_NODE* s = (*node)->right; while(s->left) { s=s->left; } s->left = (*node)->left; *node = (*node)->right; del_node(s); --tree->size; } return true; } return false; } void bstree_updata(BSTREE* tree,int old,int now) //新旧替换更新 { while(bstree_erase(old,tree)) { bstree_insert(now,tree); } } void clear_node(TREE_NODE** root) //清楚节点 { if(*root) { clear_node(&(*root)->left); clear_node(&(*root)->right); del_node(*root); *root = NULL; } } void clear_tree(BSTREE* tree) //clear_tree { clear_node(&tree->root); tree->size = 0; } void bstree_destroy(BSTREE* tree) //bstree_destroy { clear_tree(tree); delete(tree); } int bstree_size(BSTREE* tree) //大小 { return tree->size; } int bstree_deep(TREE_NODE* root) //深度DEPTH { if(root) { int Hleft = bstree_deep(root->left); int Hright = bstree_deep(root->right); return Hleft>Hright ? Hleft+1 : Hright+1; } return 0; } void printNodeByLevel(TREE_NODE* root) //层序遍历 { if(root ==NULL) { return; } vector vec; vec.push_back(root); int cur=0; int last =1; while(cur data<<" "; if(vec[cur]->left != NULL) { vec.push_back(vec[cur]->left); } if(vec[cur]->right != NULL) { vec.push_back(vec[cur]->right); } ++cur; } cout< vec; vec.push_back(root); int cur=0; while(cur data<<" "; if(vec[cur]->left != NULL) { vec.push_back(vec[cur]->left); } if(vec[cur]->right != NULL) { vec.push_back(vec[cur]->right); } ++cur; } cout< root); cout << "the first print:\n"; PreOrderTraverse(tree->root); cout << "the middle print:\n"; InOrderTraverse(tree->root); cout << "the endl print:\n"; PostOrderTraverse(tree->root); cout<<"the tree deep:\n"; cout< root)< root); cout << "destroy the tree:\n"; bstree_destroy(tree); return 0; }
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