描述：足球俱乐部包括球员、普通行政人员。球员有姓名、年龄、能力、年薪、转会费、进球总数、服役年限等重要参数；普通行政人员有姓名、年龄、能力、年薪等参数。你需要给相关管理机构开发一个管理程序，实现对众多足球俱乐部管理的基本功能。具体功能包括：

俱乐部的增删改查，俱乐部的属性包括名称、现金、其下人员；

可以对所有球员的各项属性进行简单搜索，支持输入多个条件，条件之间用&&连接，例如：

“年龄不大于25且服役年限大于5年且进球数大于100的球员”，查询表达式：!(@age>25) && @experience>5 && @kick>100

支持球员在不同俱乐部间的买卖，买卖需符合以下条件：作为买方的俱乐部的现金>=球员的转会费，交易完成后，卖方将得到转会费。

要求：

必须采用面向对象的方式，使用类组织数据结构，并注意类的继承关系；

在题目要求基础上可以自行扩展功能，提供扩实用扩展功能者适当加分（加分不超过5分）。-Descr iption : Football club including players , general administrative staff. The player has an important parameter name, age , ability, salary , transfer fee , the total number of goals, service life , etc.　 ordinary administrative staff have name, age , ability, salary and other parameters. You need to give the relevant regulatory agencies to develop a management program to achieve many of the basic functions of the football club management . Specific features include:

CRUD club , the club s properties include the name , cash , under which personnel　

On various attributes can be a simple search of all players , support input multiple conditions with && connection between the conditions , such as :

" Age is not greater than 25 and greater than 5 years service life and goals more than 100 players ," query expression :! (@ Age> 25) && @ experience> 5 && @ kick> 100

Support players traded between different clubs , trading must meet the following conditions: a cash buyer s