原文链接
应用C++构建一个二叉树并复制、输入。
程序
#include <stdio.h>#include <stdlib.h>//#include <cstdio>#include <vector>#include<iostream>#include <stack> #include<cstdlib>#include <string>using namespace std;struct TreeNode // 定义二叉树{ int val; // 以后节点值用val示意 struct TreeNode *left; // 指向左子树的指针用left示意 struct TreeNode *right; // 指向右子树的指针用right示意 TreeNode(int x) :val(x), left(NULL), right(NULL) { } // 初始化以后结点值为x,左右子树为空};//创立树TreeNode* insert(TreeNode* tree, int value){ TreeNode* node = (TreeNode*)malloc(sizeof(TreeNode)); // 创立一个节点 node->val = value; // 初始化节点 // malloc函数能够调配长度 node->left = NULL; node->right = NULL; TreeNode* temp = tree; // 从树根开始 while (temp != NULL) { if (value < temp->val) // 小于根节点就进左子树 { if (temp->left == NULL) { temp->left = node; // 新插入的数为temp的左子树 return tree; } else // 下一轮判断 temp = temp->left; } else // 否则进右子树 { if (temp->right == NULL) { temp->right = node; // 新插入的数为temp的右子树 return tree; } else // 下一轮判断 temp = temp->right; } } return tree;} // ************* 输入图形二叉树 *************void output_impl(TreeNode* n, bool left, string const& indent){ if (n->right) { output_impl(n->right, false, indent + (left ? "| " : " ")); } cout << indent; cout << (left ? '\\' : '/'); cout << "-----"; cout << n->val << endl; if (n->left) { output_impl(n->left, true, indent + (left ? " " : "| ")); }}void output(TreeNode* root){ if (root->right) { output_impl(root->right, false, ""); } cout << root->val << endl; if (root->left) { output_impl(root->left, true, ""); } system("pause");}// ******************************************void CopyBiTree(TreeNode* root, TreeNode* newroot) // 复制二叉树{ if (root == nullptr) return; else { newroot->val = root->val; if (root->left != nullptr) newroot->left = new TreeNode(0); if (root->right != nullptr) newroot->right = new TreeNode(0); CopyBiTree(root->left, newroot->left); CopyBiTree(root->right, newroot->right); } //output(newroot);}// ====================测试代码====================int main(){ TreeNode* tree =new TreeNode(10); // 树的根节点 TreeNode* treeresult; treeresult = insert(tree, 6); // 输出n个数并创立这个树 treeresult = insert(tree, 4); treeresult = insert(tree, 8); treeresult = insert(tree, 14); treeresult = insert(tree, 12); treeresult = insert(tree, 16); TreeNode* mirroot = new TreeNode(10); CopyBiTree(treeresult, mirroot); // 复制二叉树 output(treeresult); // 输入原二叉树 output(mirroot); // 输入复制的二叉树}
后果
学习更多编程常识,请关注我的公众号:
代码的路