每一个参加排列的数据对应二叉树的一个结点，且任一结点如果有左（右）子树，则左（右）子树各结点的数据必须小（大）于该结点的数据。中序遍历排序二叉树即得排序结果。-Order to participate in each of the data corresponding to a binary tree node, and any one node if there is left (right) subtree, then the left (right) subtree of the data