股票信息系统的

1、基本功能：

（1）添加记录

先判断链表是否已经存在。若不存在，需首先自动新建一个链表，然后再添加一条或多条记录。

（2）显示记录

显示当前所有记录。

（3）查询记录

按名称查找，并显示该记录。

（4）代号的排序

按代号的字母顺序排序，涉及到冒泡等排序算法。

（5）删除记录

实现逐条删除和删除全部记录两种功能。

（6）更新记录

修改已存在记录的信息（提示：需首先判断该记录是否存在）。

（7）按关系类别显示记录

只显示指定公司的记录。

（8）保存记录

存储所有记录到某个文件（.txt）或缺省文件（shares.txt）。

（9）读入记录

从某个文件（.txt）或缺省文件（shares.txt）读入所有记录。首先判断当前是否有记录在进行操作，若有，进行存储或放弃存储，然后释放内存空间，之后才能从文件读入记录。

（10）退出

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Stock Information System

1, the basic functions:

(1) Add record

First determine whether the list already exists. If not exist, automatically create a new list to be first, and then add one or more records.

(2) Display Record

Show all current records.

(3) query record

Search by name, and displays the record.

(4) the sort code

Sorted in alphabetical order by code, such as involving bubble sort algorithm.

(5) Delete records

To achieve one by one remove, and delete all records two functions.

(6) to update records

Modify the existing record information (hint: the need to first determine whether the record exists.)

(7) types of relationships shown by recording

Select only the company s records.

(8) record keeping

Store all records to a file (. Txt) or the default file (shares.txt).

(9) read into the record

From a file (. Txt) or the default file (shares.txt) read all records. First, determine whether the current record during the operation, if so, stor