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

NAME

     fputc, putc, putc_unlocked, putchar, 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
     putc_unlocked(int c, FILE *stream);

     int
     putchar(int c);

     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.

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

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

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

     The putc_unlocked() and putchar_unlocked() functions are equivalent to putc() and putchar() respectively, except that the caller is responsi-
     ble for locking the stream with flockfile(3) before calling them.	These functions may be used to avoid the overhead of locking the stream
     for each character, and to avoid output being interspersed from multiple threads writing to the same stream.

RETURN VALUES

     The functions, fputc(), putc(), putchar(), putc_unlocked(), and putchar_unlocked() return the character written.  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), flockfile(3), fopen(3), getc(3), putwc(3), stdio(3)

STANDARDS

     The functions fputc(), putc(), and putchar(), conform to ISO/IEC 9899:1990 (``ISO C90'').	The putc_unlocked() and putchar_unlocked() func-
     tions conform to IEEE Std 1003.1-2001 (``POSIX.1'').  A function putw() function appeared in Version 6 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
								 January 10, 2003							       BSD