fputwc, putwc - write a wide character to a FILE stream

       For an explanation of the terms used in this section, see attributes(7).
       ┌─────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                                                                   │ Attribute     │ Value   │
       ├─────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │ fputwc(), putwc()                                                           │ Thread safety │ MT-Safe │
       └─────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

       The  fputwc()  function  is  the  wide-character equivalent of the fputc(3) function.  It writes the wide
       character wc to stream.  If ferror(stream) becomes true, it returns WEOF.  If a wide-character conversion
       error occurs, it sets errno to EILSEQ and returns WEOF.  Otherwise, it returns wc.

       The putwc() function or macro functions identically to fputwc().  It may be implemented as a  macro,  and
       may evaluate its argument more than once.  There is no reason ever to use it.

       For nonlocking counterparts, see unlocked_stdio(3).

       Apart from the usual ones, there is

       EILSEQ Conversion of wc to the stream's encoding fails.

       C99, POSIX.1-2001.

       Standard C library (libc, -lc)

       fputwc, putwc - write a wide character to a FILE stream

       The behavior of fputwc() depends on the LC_CTYPE category of the current locale.

       In the absence of additional information passed to the fopen(3) call, it is  reasonable  to  expect  that
       fputwc() will actually write the multibyte sequence corresponding to the wide character wc.

       On  success, fputwc() function returns wc.  Otherwise, WEOF is returned, and errno is set to indicate the
       error.

fgetwc(3), fputws(3), unlocked_stdio(3)

Linux man-pages 6.9.1                              2024-05-02                                          fputwc(3)

       C11, POSIX.1-2008.

#include<stdio.h>#include<wchar.h>wint_tfputwc(wchar_twc,FILE*stream);wint_tputwc(wchar_twc,FILE*stream);