功能说明： 如果生成二叉树每次都手工输入整数，建立二叉树， 可以进行添加、遍历、查找、删除，如果插入的数和数中的数重复不予插入-Function Descr iption: If the binary tree generated integer entered manually each time, the establishment of tree, you can add, traverse, search, delete, if the insertion of a few and