用 C++ 将二叉树转换为其镜像树
本教程中,我们将讨论一项用 C++ 转换二叉树为镜像树的程序。
为此,我们将会提供一棵二叉树。我们的任务是交换左边与右边的值,使用给定的二叉树创建镜像树。
示例
#include<bits/stdc++.h> using namespace std; //binary tree node structure struct Node{ int data; struct Node* left; struct Node* right; }; //creation of a new node with no child nodes struct Node* newNode(int data){ struct Node* node = (struct Node*)malloc(sizeof(struct Node)); node->data = data; node->left = NULL; node->right = NULL; return(node); } void mirror(struct Node* node){ if (node == NULL) return; else{ struct Node* temp; //swapping the subtrees mirror(node->left); mirror(node->right); temp = node->left; node->left = node->right; node->right = temp; } } //printing the inorder traversal void print_tree(struct Node* node){ if (node == NULL) return; print_tree(node->left); cout << node->data << " "; print_tree(node->right); } int main(){ struct Node *root = newNode(1); root->left = newNode(2); root->right = newNode(3); root->left->left = newNode(4); root->left->right = newNode(5); //printing the initial tree cout << "Inorder traversal of the constructed" << endl; print_tree(root); mirror(root); //printing the mirror tree cout << "\nInorder traversal of the mirror tree" << endl; print_tree(root); return 0; }
输出
Inorder traversal of the constructed 4 2 5 1 3 Inorder traversal of the mirror tree 3 1 5 2 4
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