Scroll Down to See All▾
abortabsacosasctimeasctime_rasinassertatanatan2atexitatofatoiatolbsearchbtowccalloccatclosecatgetscatopenceilclearerrclockcoscoshctimectime_rdifftimediverferfcexitexpfabsfclosefdopenfeofferrorfflushfgetcfgetposfgetsfgetwcfgetwsfopenfprintffputcfputwsfreadfreefreopenfrexpfscanffseekfsetposftellfwidefwprintffwritefwscanfgetcgetchargetenvgetwcgetwchargmtimegmtime_rhypotisalnumisalphaisasciiisblankiscntrlisdigitisgraphislowerisprintispunctisspaceisupperiswalnumiswalphaiswblankiswcntrliswctypeiswdigitiswgraphiswloweriswprintiswpunctiswspaceiswupperiswxdigitisxdigitj0j1jnlabsldexpldivlocaleconvlocaltimelocaltime_rloglog10longjmpmallocmblenmbrlenmbrtowcmbsinitmbsrtowcsmbstowcsmbtowcmemchrmemcmpmemcpymemmovememsetmktimemodfnextafternextafterlnexttowardnexttowardlnl_langinfoperrorpowprintfputcputcharputenvputsputwcputwcharqsortquantexpd32quantexpd64quantexpd128quantized32quantized64quantized128samequantumd32raiserandrand_rreallocregcompregerrorregexecregfreeremoverenamerewindscanfsetbufsetjmpsetlocalesetvbufsignalsinsinhsnprintfsprintfsqrtsrandsscanfstrcasecmpstrcatstrchrstrcmpstrcollstrcpystrcspnstrerrorstrfmonstrftimestrlenstrncasecmpstrncatstrncmpstrncpystrpbrkstrptimestrrchrstrspnstrstrstrtodstrtod32strtod64strtofstrtokstrtok_rstrtolstrtoldstrtoulstrxfrmswprintfswscanfsystemtantanhtimetime64tmpfiletmpnamtoasciitolowertouppertowctranstowlowertowupperungetcungetwcva_argva_copyva_endva_startvfprintfvfscanfvfwprintfvfwscanfvprintfvscanfvsprintfvsnprintfvsscanfvswprintfvswscanfvwprintfvwscanfwcrtombwcscatwcschrwcscmpwcscollwcscpywcscpywcsftimewcslenwcsncatwcsncmpwcsncpywcspbrkwcsptimewcsrchrwcsrtombswcsspnwcsstrwcstodwcstod32wcstod64wcstod128wcstofwcstokwcstolwcstoldwcstombswcstoulwcsxfrmwctobwctombwctranswctypewcwidthwmemchrwmemcmpwmemcpywmemmovewmemsetwprintfwscanfy0y1yn



Function Details : strtod128

_Decimal128strdot128(const char * nptr,char ** endptr) ;

Return Type : _Decimal128

A decimal floating-point type that occupies 128 bits. Supports base-10 arithmetic with 34 decimal digits of precision.
Read about return values of strdot128 function .

1st Parameter Type : const char *

Pointer to read-only string

1st Parameter

Pointer to the null-terminated string that represents the number to be converted.

2nd Parameter Type : char **

A pointer to a pointer to a null-terminated string. Commonly used in functions like `strtol` and `strtok_r` to store the address of the first invalid character or to maintain state across function calls.

2nd Parameter

Pointer to a character pointer that will store the address of the first invalid character after the number in `nptr`.

Read more about parameters of strtod128 in parameters section
The strtod128function in C language Converts the initial portion of the string to a decimal floating-point number with 128-bit precision.
The strtod128 function converts the initial portion of the string pointed to by nptr to a _Decimal128 value. It follows similar rules to strtod, but produces a decimal floating-point result with the highest precision among the decimal conversion functions. This function is part of the optional decimal floating-point arithmetic support in C.
The strtod128function takes 2 parameters:
  • •
    const char * `nptr`: Pointer to the null-terminated string that represents the number to be converted.
  • •
    char ** `endptr`: Pointer to a character pointer that will store the address of the first invalid character after the number in `nptr`.
Converts the initial portion of the string pointed to by `nptr` to a `_Decimal128` floating-point value. The conversion stops at the first invalid character. If `endptr` is not NULL, it points to the character after the last valid character used in the conversion.
The strtod128 function return value :
  • Returns the converted _Decimal128 value
  • If no conversion could be performed, positive or negative zero is returned (depending on the sign of the input)
  • If the correct value is outside the range of representable values, the function returns the appropriate positive or negative infinity and sets errno to ERANGE

Output

This example demonstrates basic usage of strtod128 to convert a string to a _Decimal128 value, showing its very high precision.