说明： 非API函数检测操作系统类型 现在几乎所有的程序员都采用扩展程序接口（API）来获取操作系统信息。采用AIP函数，我们不需要关心当前所用的操作系统具体状况 (non-operating system API function testing is now almost all types of programmers are used to expand programming interface (API) to access the operating system information. Using AIP function, we need not concern the current operating system used by the specific situation)
