说明：  对于一个单位的人员库，提供由姓名生成姓名首字符功能，并提供首字符的简单应用示例。本功能用于一些特殊的场合，但很好用。不需要记住职工的工号，用两三个字母即可实现输入。(原创)
(units for a pool, provide the names generated by the first names of characters function, and provide the first character of the simple application example. The function for some special occasion, but is useful. Employees do not need to remember the workers, with 23 alphanumeric input can be realized. (Original))