Editing C file input/output (section)

===Variables===
[[File:Stdstreams-notitle.svg|frameless|right]]
Variables defined in the {{mono|<stdio.h>}} header include:

{| class="wikitable"
|-
! Name !! Notes
|-
! style="font-family:monospace" | [[Standard streams#Standard input (stdin)|stdin]]
| A pointer to a {{mono|FILE}} which refers to the standard input stream, usually a keyboard.
|-
! style="font-family:monospace" | [[Standard streams#Standard output (stdout)|stdout]]
| A pointer to a {{mono|FILE}} which refers to the standard output stream, usually a display terminal.
|-
! style="font-family:monospace" | [[Standard streams#Standard error (stderr)|stderr]]
| A pointer to a {{mono|FILE}} which refers to the standard error stream, often a display terminal.
|}