PUTCHAR(3) NEWLIB PUTCHAR(3)NAME
4.46 `putchar'--write a character (macro)
SYNOPSIS
#include <stdio.h>
int putchar(int CH);
int _putchar_r(struct _reent *REENT, int CH);
DESCRIPTION
`putchar' is a macro, defined in `stdio.h'. `putchar' writes its argu‐
ment to the standard output stream, after converting it from an `int'
to an `unsigned char'.
The alternate function `_putchar_r' is a reentrant version. The
extra argument REENT is a pointer to a reentrancy structure.
RETURNS
If successful, `putchar' returns its argument CH. If an error inter‐
venes, the result is `EOF'. You can use ``ferror(stdin)'' to query for
errors.
PORTABILITY
ANSI C requires `putchar'; it suggests, but does not require, that
`putchar' be implemented as a macro.
Supporting OS subroutines required: `close', `fstat', `isatty',
`lseek', `read', `sbrk', `write'.
SEE ALSOputchar 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 PUTCHAR(3)