def MirroRecursively(root): # root is None or just one node, return root if None == root or None == root.left and None == root.right: return root root.left, root.right = root.right, root.left MirroRecursively(root.left) MirroRecursively(root.right) return root
【剑指offer】Q19:二叉树的镜像,布布扣,bubuko.com
原文地址:http://blog.csdn.net/shiquxinkong/article/details/37361697