Editing C file input/output (section)

===Member types===
Data types defined in the {{mono|<stdio.h>}} header include:
*{{mono|[https://en.cppreference.com/w/c/io FILE]}} – also known as a {{anchor|file handle}}'''file [[Handle (computing)|handle]]''' or a '''{{Visible anchor|FILE pointer}}''', this is an [[opaque pointer]] containing the information about a file or text stream needed to perform input or output operations on it, including:
**platform-specific identifier of the associated I/O device, such as a [[file descriptor]] 
**the buffer
**stream orientation indicator (unset, narrow, or wide)
**stream buffering state indicator (unbuffered, line buffered, fully buffered)
**I/O mode indicator (input stream, output stream, or update stream)
**binary/text mode indicator
**end-of-file indicator
**error indicator
**the current stream position and multibyte conversion state (an object of type mbstate_t)
**reentrant lock (required as of [[C11 (C standard revision)|C11]])
*{{mono|fpos_t}} – a non-array type capable of uniquely identifying the position of every byte in a file and every conversion state that can occur in all supported multibyte character encodings
*{{mono|size_t}} – an [[unsigned integer]] type which is the type of the result of the {{mono|[[sizeof]]}} operator.