给定一个序列，按照顺序输入，构建一颗二叉搜索树。本实验为数据结构必做实验，仅提供cpp文件，读者可在编译器上自行编译实现。-Given a sequence of inputs in the order to build a binary search tree. In this study, the data structure must do the experiment, only cpp file, the reader can compiler to compile your own