This is similar to the file pointer for a file stream in standard C.

这类似于在标准c中为文件流创建FILE指针。

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The file pointer cannot be set on the specified device or file.

无法在指定的设备或文件上设置文件指针。

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Open for reading only; place the file pointer at the beginning of the file.

以只读方式打开，放置在文件开头的文件指针。

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