以广州旅游业为背景，设计一个变长记录文件存取类库。程序采用B+树作为索引系统，支持字节流嵌入方式和文件链接方式，以较友好的用户界面，加强程序容错性-Guangzhou tourism industry as the background, to design a variable-length record file access library. Program uses B+ tree as an indexing system to support byte-stream mode and

用图的相关算法，解决清华园旅游问题，包括计算游览完不包括教学楼的所有景点需要的次数，找出最长的最短路径最小的点，计算铺设能到达所有景点的光纤的最小长度及路径。通过实验掌握图的表示方法和算法。-With related algorithms map, solve Tsinghua tourism issues, including the calculation does not include the number of times after visiting all the attracti