fputwc, putwc

wint_t fputwc( wchar_t ch, FILE *stream );

wint_t putwc( wchar_t ch, FILE *stream );

Writes a wide character ch to the given output stream stream. putwc() may be implemented as a macro and may evaluate stream more than once.

Parameters

Return value

Returns a copy of ch on success.

On failure, returns WEOF and sets the error indicator (see ferror()) on stream.

If an encoding error occurred, additionally sets errno to EILSEQ.

Example

#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include <errno.h>
 
int main(void)
{
    setlocale(LC_ALL, "en_US.utf8");
 
    errno = 0;
    if (fputwc(L'????', stdout) == WEOF) {
        if (errno == EILSEQ)
            puts("Encoding error in fputwc.");
        else
            puts("I/O error in fputwc.");
        return EXIT_FAILURE;
    }
}

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References

• C11 standard (ISO/IEC 9899:2011):
• 7.29.3.3 The fputwc function (p: 422-423)
• 7.29.3.8 The putwc function (p: 424)
• C99 standard (ISO/IEC 9899:1999):
• 7.24.3.3 The fputwc function (p: 368)
• 7.24.3.8 The putwc function (p: 370)

See also