1获取驱动器序列号 2获取磁盘空间数据 3判别并定位到光驱（软驱） 4递归法遍历磁盘目录 带源码的小例子，拿来就可以使用-Get a drive serial number 2 to obtain data on disk space, and navigate to the three discriminant drive (floppy) 4 recursive method traverse the disk directory with the source code a