go + 递归
/** * * @param root TreeNode类 * @param sum int整型 * @return bool布尔型 */ func hasPathSum( root *TreeNode , sum int ) bool { // write code here if root == nil { return false } if root.Left == nil && root.Right == nil && root.Val == sum { return true } left, right := false, false if root.Left != nil { left = hasPathSum(root.Left, sum-root.Val) } if root.Right != nil { right = hasPathSum(root.Right, sum-root.Val) } return left || right }