100. 相同的树c

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     struct TreeNode *left;
 *     struct TreeNode *right;
 * };
 */
bool isSameTree(struct TreeNode* p, struct TreeNode* q) {
    if(!p&&!q) return true;
    if(!p&&q ||p&&!q) return false;
    if(q->val!=p->val) return false;
    return isSameTree(p->left,q->left)&&isSameTree(p->right,q->right); 
}

结果：