假设二叉树用链接存储结构进行存储，root指向根结点，p所指结点为任一给定的结点，编写一个求出从根结点到p所指结点之间路径的函数。-assumptions used to link storage structure for storage, root at Root, p referring to the node to a set of nodes, obtained from a prepared Root referred to p path between nodes function.