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PUTC(3)			 BSD Library Functions Manual		       PUTC(3)

NAME
     fputc, putc, putchar, putc_unlocked, putchar_unlocked, putw -- output a
     character or word to a stream

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <stdio.h>

     int
     fputc(int c, FILE *stream);

     int
     putc(int c, FILE *stream);

     int
     putchar(int c);

     int
     putc_unlocked(int c, FILE *stream);

     int
     putchar_unlocked(int c);

     int
     putw(int w, FILE *stream);

DESCRIPTION
     The fputc() function writes the character c (converted to an ``unsigned
     char'') to	the output stream pointed to by	stream.

     putc() acts essentially identically to fputc(), but is a macro that ex-
     pands in-line.  It	may evaluate stream more than once, so arguments given
     to	putc() should not be expressions with potential	side effects.

     putchar() is identical to putc() with an output stream of stdout.

     The putc_unlocked() and putchar_unlocked()	functions provide functional-
     ity identical to that of putc() and putchar(), respectively, but do not
     perform implicit locking of the streams they operate on.  In multi-
     threaded programs they may	be used	only within a scope in which the
     stream has	been successfully locked by the	calling	thread using either
     flockfile(3) or ftrylockfile(3), and may later be released	using
     funlockfile(3).

     The putw()	function writes	the specified int to the named output stream.

RETURN VALUES
     The functions, fputc(), putc() and	putchar() return the character writ-
     ten.  If an error occurs, the value EOF is	returned.  The putw() function
     returns 0 on success; EOF is returned if a	write error occurs, or if an
     attempt is	made to	write a	read-only stream.

SEE ALSO
     ferror(3),	fopen(3), getc(3), stdio(3)

STANDARDS
     The functions fputc(), putc(), and	putchar(), conform to ANSI X3.159-1989
     ("ANSI C89").  The	functions putc_unlocked() and putchar_unlocked() con-
     form to ISO/IEC 9945-1:1996 ("POSIX.1").

HISTORY
     The functions putc(), putchar(), and putw() first appeared	in Version 6
     AT&T UNIX.	 The function fputc() appeared in Version 7 AT&T UNIX.

BUGS
     The size and byte order of	an int varies from one machine to another, and
     putw() is not recommended for portable applications.

BSD				  May 6, 2010				   BSD

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | STANDARDS | HISTORY | BUGS

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