write offset correction 碟来确定偏移值
Finally, a VFS file represents an open file (keeps state for the open file such as the write offset, and so on).
最后,VFS文件表示一个打开的文件(保存打开的文件的状态,比如写偏移量等等)。
If we need now to write or read information from it we just call the map view methods with the correct offset.
如果我们现在就要从内存映射文件读或写信息,只需要调用带有正确偏移量的映射视图方法就行了。
Write code that asks for a time zone or the offset from GMT, and then develop greetings based on that information.
编写代码询问时区或与GMT的时差,然后根据这一信息提供问候语。
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