你上面的回答还是错了,请你检查下哪里错了
时间: 2024-03-13 11:46:03 浏览: 15
非常抱歉,我之前的回答中仍然存在错误。正确的后序遍历序列应该是`ACFBHJIKGED`。以下是更新后的代码实现:
```c
#include <stdio.h>
#include <stdlib.h>
typedef struct TreeNode {
char val;
struct TreeNode *left;
struct TreeNode *right;
} TreeNode;
// 根据先序序列和中序序列构建二叉树
TreeNode* buildTree(char* preorder, char* inorder, int preStart, int preEnd, int inStart, int inEnd) {
if (preStart > preEnd) {
return NULL;
}
char rootVal = preorder[preStart];
int rootIndex = 0;
for (int i = inStart; i <= inEnd; i++) {
if (inorder[i] == rootVal) {
rootIndex = i;
break;
}
}
int leftSize = rootIndex - inStart;
TreeNode* root = (TreeNode*)malloc(sizeof(TreeNode));
root->val = rootVal;
root->left = buildTree(preorder, inorder, preStart+1, preStart+leftSize, inStart, rootIndex-1);
root->right = buildTree(preorder, inorder, preStart+leftSize+1, preEnd, rootIndex+1, inEnd);
return root;
}
// 后序遍历二叉树
void postorderTraversal(TreeNode* root) {
if (root == NULL) {
return;
}
postorderTraversal(root->left);
postorderTraversal(root->right);
printf("%c", root->val);
}
int main() {
char preorder[] = "EBADCFHGIKJ";
char inorder[] = "ABCDEFGHIJK";
int len = sizeof(preorder) / sizeof(preorder[0]);
TreeNode* root = buildTree(preorder, inorder, 0, len-1, 0, len-1);
postorderTraversal(root);
return 0;
}
```
根据先序序列和中序序列构建出的二叉树如下所示:
```
E
/ \
B J
/ \ / \
A D I K
/ \
C F
\
H
```
该二叉树的后序遍历序列为:`ACFBHJIKGED`。
请您再次确认,如果还有任何问题,请随时告诉我。
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![doc](https://img-home.csdnimg.cn/images/20210720083327.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)