Scroll Down to See All▾
abortabsacosasctimeasctime_rasinassertatanatan2atexitatofatoiatolbsearchbtowccalloccatclosecatgetscatopenceilclearerrclockcoscoshctimectime_rdifftimediverferfcexitexpfabsfclosefdopenfeofferrorfflushfgetcfgetposfgetsfgetwcfgetwsfopenfprintffputcfputwsfreadfreefreopenfrexpfscanffseekfsetposftellfwidefwritefwscanfgetcgetchargetenvgetwcgetwchargmtimegmtime_rhypotisalnumisalphaisasciiisblankiscntrlisdigitisgraphislowerisprintispunctisspaceisupperiswalnumiswalphaiswblankiswcntrliswctypeiswdigitiswgraphiswloweriswprintiswpunctiswspaceiswupperiswxdigitisxdigitj0j1jnlabsldexpldivlocaleconvlocaltimelocaltime_rloglog10longjmpmallocmblenmbrlenmbrtowcmbsinitmbsrtowcsmbstowcsmbtowcmemchrmemcmpmemcpymemmovememsetmktimemodfnextafternextafterlnexttowardnexttowardlnl_langinfoperrorpowprintfputcputcharputenvputsputwcputwcharqsortquantexpd32quantexpd64quantexpd128quantized32quantized64quantized128samequantumd32raiserandrand_rreallocregcompregerrorregexecregfreeremoverenamerewindscanfsetbufsetjmpsetlocalesetvbufsignalsinsinhsnprintfsprintfsqrtsrandsscanfstrcasecmpstrcatstrchrstrcmpstrcollstrcpystrcspnstrerrorstrfmonstrftimestrlenstrncasecmpstrncatstrncmpstrncpystrpbrkstrptimestrrchrstrspnstrstrstrtodstrtod32strtod64strtod128strtofstrtokstrtok_rstrtolstrtoldstrtoulstrxfrmswprintfswscanfsystemtantanhtimetime64tmpfiletmpnamtoasciitolowertouppertowctranstowlowertowupperungetcungetwcva_argva_copyva_endva_startvfprintfvfscanfvfwprintfvfwscanfvprintfvscanfvsprintfvsnprintfvsscanfvswprintfvswscanfvwprintfvwscanfwcrtombwcscatwcschrwcscmpwcscollwcscpywcscpywcsftimewcslenwcsncatwcsncmpwcsncpywcspbrkwcsptimewcsrchrwcsrtombswcsspnwcsstrwcstodwcstod32wcstod64wcstod128wcstofwcstokwcstolwcstoldwcstombswcstoulwcsxfrmwctobwctombwctranswctypewcwidthwmemchrwmemcmpwmemcpywmemmovewmemsetwprintfwscanfy0y1yn



Function Details : fwprintf

intfwprintf(FILE * stream,const wchar_t * format,... args) ;

Return Type : int

Integer type (typically 4 bytes, -2,147,483,648 to 2,147,483,647)
Read about return values of fwprintf function .

1st Parameter Type : FILE *

Pointer to FILE structure for file operations

1st Parameter

Pointer to the file stream where the wide-character output will be written

2nd Parameter Type : const wchar_t *

A pointer to a read-only wide-character string, where each character is of type `wchar_t`. Used for representing text in wide-character encoding to support extended character sets, such as Unicode. The string is null-terminated, with the terminator being a `wchar_t` with value 0.

2nd Parameter

A null-terminated wide-character string specifying how to format the output

3rd Parameter Type : ...

Represents a variable number of arguments in a function. Used in functions like `printf` or `fprintf` to accept additional parameters beyond those explicitly declared.

3rd Parameter

A variable number of arguments to be formatted according to the `format` string

Read more about parameters of fwprintf in parameters section
The fwprintffunction in C language Writes formatted wide character output to a stream.
The fwprintf function writes output to the stream pointed to by stream, under control of the wide string pointed to by format that specifies how subsequent arguments are converted for output. It behaves similarly to fprintf, but uses wide characters. If there are insufficient arguments for the format, the behavior is undefined. If the format is exhausted while arguments remain, the excess arguments are evaluated but are otherwise ignored.
The fwprintffunction takes 3 parameters:
  • •
    FILE * `stream`: Pointer to the file stream where the wide-character output will be written
  • •
    const wchar_t * `format`: A null-terminated wide-character string specifying how to format the output
  • •
    ... `args`: A variable number of arguments to be formatted according to the `format` string
Writes formatted wide-character output to the specified file stream, based on the `format` string and additional arguments. Returns the number of wide characters written, or a negative value if an error occurs.
The fwprintf function return value :
  • Returns the number of wide characters transmitted, or a negative value if an output or encoding error occurred

Output

This example demonstrates basic usage of fwprintf to write wide characters to a file. It includes error checking and reports the number of characters written.