Manpage of GETCHAR
GETCHAR
Section: NEWLIB (3)
Updated: 2005 Feb 23
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NAME
3.23 `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 ALSO
getchar
is part of the
libc
library.
The full documentation for
libc
is maintained as a Texinfo manual. If
info
and
libc
are properly installed at your site, the command
-
info libc
will give you access to the complete manual.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURNS
-
- PORTABILITY
-
- SEE ALSO
-
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Time: 21:25:18 GMT, May 16, 2005
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