分别用数组和链表方式实现去除文件中的重复行。先将文件内容读入一buffer,按行拆分，每行数据只取\t之前的部分。然后用二分直接插入法将不重复的字符串放入一二维数组或动态链表中。 -Respectively, be achieved using arrays and linked the file to remove duplicate rows. Content of the document read into a first buffer, split by row, each row