hello-algo/codes/c/chapter_tree/binary_tree.c

/**
 * File: binary_tree.c
 * Created Time: 2023-01-11
 * Author: Reanon (793584285@qq.com)
 */

#include "../include/include.h"

/* Driver Code */
int main() {
    /* 初始化二叉树 */
    // 初始化节点
    TreeNode *n1 = newTreeNode(1);
    TreeNode *n2 = newTreeNode(2);
    TreeNode *n3 = newTreeNode(3);
    TreeNode *n4 = newTreeNode(4);
    TreeNode *n5 = newTreeNode(5);
    // 构建引用指向（即指针）
    n1->left = n2;
    n1->right = n3;
    n2->left = n4;
    n2->right = n5;
    printf("初始化二叉树\n");
    printTree(n1);

    /* 插入与删除节点 */
    TreeNode *P = newTreeNode(0);
    // 在 n1 -> n2 中间插入节点 P
    n1->left = P;
    P->left = n2;
    printf("插入节点 P 后\n");
    printTree(n1);

    // 删除节点 P
    n1->left = n2;
    // 释放内存
    free(P);
    printf("删除节点 P 后\n");
    printTree(n1);

    return 0;
}