1、修改数据结构，增加现金成员，每只股票增加牌价。每个用户的数据库中同样也增加现金数目的成员。

2、增加股票教育系统的接口程序。包括四个方面，对于以上的修改均须输入密码，如输入密码正确后才能进入数据库进行修改。结果均存入Stock_File.dat中。

3、将股票数据的处理由数组改为链表，可以处理多只股票的交易，链表以交易代码的序号进行排序。

4、增加用户数据系统的接口程序，包括修改用户名密码等，包括不能透支等。

-1, modify the data structure, increase cash members, each stock increased license premium. Each user' s database also increase the number of members of the cash. 2, the increase in the the stock educational system interface program. Includes four aspects for the above modifications are required to enter a password, such as entering a password to enter the correct database modify. Results are deposited Stock_File.dat. 3, the processing of the stock data from an array to a linked list, you can handle the trading of stocks, linked list to sort to the serial number of the transaction code. 4, increase user data interface program, modify the user name and password, and can not be overdrawn.