PUTC(3P)                                            POSIX Programmer's Manual                                           PUTC(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult the corresponding Linux manual page for details of Linux behavior), or the  interface  may  not  be  implemented  on
       Linux.

NAME
       putc - put a byte on a stream

SYNOPSIS
       #include <stdio.h>

       int putc(int c, FILE *stream);


DESCRIPTION
       The  putc()  function  shall be equivalent to fputc(), except that if it is implemented as a macro it may evaluate stream
       more than once, so the argument should never be an expression with side effects.

RETURN VALUE
       Refer to fputc().

ERRORS
       Refer to fputc().

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       Since it may be implemented as a macro, putc() may treat a stream argument with side effects incorrectly. In  particular,
       putc(c,*f++)  does not necessarily work correctly. Therefore, use of this function is not recommended in such situations;
       fputc() should be used instead.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       fputc(), the Base Definitions volume of IEEE Std 1003.1-2001, <stdio.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003  Edition,  Standard  for
       Information  Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copy-
       right (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any
       discrepancy  between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group
       Standard  is  the  referee   document.   The   original   Standard   can   be   obtained   online   at   http://www.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                      PUTC(3P)