GETCHAR(3) NEWLIB GETCHAR(3)NAME
4.34 `getchar'--read a character (macro)
SYNOPSIS
#include <stdio.h>
int getchar(void);
int _getchar_r(struct _reent *REENT);
DESCRIPTION
`getchar' is a macro, defined in `stdio.h'. You can use `getchar' to
get the next single character from the standard input stream. As a
side effect, `getchar' advances the standard input's current position
indicator.
The alternate function `_getchar_r' is a reentrant version. The
extra argument REENT is a pointer to a reentrancy structure.
RETURNS
The next character (read as an `unsigned char', and cast to `int'),
unless there is no more data, or the host system reports a read error;
in either of these situations, `getchar' returns `EOF'.
You can distinguish the two situations that cause an `EOF' result by
using ``ferror(stdin)'' and ``feof(stdin)''.
PORTABILITY
ANSI C requires `getchar'; it suggests, but does not require, that
`getchar' be implemented as a macro.
Supporting OS subroutines required: `close', `fstat', `isatty',
`lseek', `read', `sbrk', `write'.
SEE ALSOgetchar is part of the library. The full documentation for is main‐
tained as a Texinfo manual. If info and are properly installed at your
site, the command
info
will give you access to the complete manual.
NEWLIB April 2010 GETCHAR(3)
