/** * struct TreeNode { * int val; * struct TreeNode *left; * struct TreeNode *right; * }; */ class Solution { public: /** * * @param root TreeNode类 * @param sum int整型 * @return bool布尔型 */ bool hasPathSum(TreeNode* root, int sum) { if(!root) return false; sum -= root->val; if(!root->left && !root->right){ if(sum == 0) return true; else return false; } return hasPathSum(root->left, sum) || hasPathSum(root->right, sum); } };