【leetcode 简单】第二十三题 二叉树的最大深度

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     struct TreeNode *left;
 *     struct TreeNode *right;
 * };
 */

int maxDepth(struct TreeNode* root) {
    int HL,HR,MaxH;
    if(root)
    {
        HL = maxDepth(root->left);
        HR = maxDepth(root->right);
        MaxH = (HL > HR) ? HL : HR;
        return (MaxH + 1);
    }
    else
    {
        return 0;
    }
}