C语言:
/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* struct TreeNode *left;
* struct TreeNode *right;
* };
*/
struct TreeNode* mergeTrees(struct TreeNode* t1, struct TreeNode* t2){
if(t1==NULL){
return t2;
}
if(t2==NULL){
return t1;
}
t1->val += t2->val;
t1->left = mergeTrees(t1->left,t2->left);
t1->right = mergeTrees(t1->right,t2->right);
return t1;
}
Java:
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
class Solution {
public TreeNode mergeTrees(TreeNode t1, TreeNode t2) {
if(t1==null){
return t2;
}
if(t2==null){
return t1;
}
t1.val +=t2.val;
t1.left = mergeTrees(t1.left,t2.left);
t1.right = mergeTrees(t1.right,t2.right);
return t1;
}
}
相关知识点:
-> 和 . 的区别
-
性质不同:
->:是指向结构体成员的运算符
. :是断点符号,不属于运算符 -
指向不同:
->:指向结构体或对象的首地址
. :指向结构体或对象 -
访问不同:
->:使用一个指向以便访问结构体或对象内的成员
. :使用一个指向以便访问结构体或对象