<assert.h><complex.h><ctype.h><errno.h><fenv.h><float.h><inttypes.h><iso646.h><limits.h><locale.h><math.h><setjmp.h><signal.h><stdalign.h><stdarg.h><stdatomic.h><stdbool.h><stddef.h><stdint.h><stdio.h><stdlib.h><stdnoreturn.h><string.h><tgmath.h><threads.h><time.h><uchar.h><wchar.h><wctype.h>
Compare with earlier versions:
C11 defines 29 standard headers and specifies 1308 names. Among them, the macro
__STDC_ expands to
201112L.
The headers <stdatomic.h> and
<threads.h>
introduce a unified API for multithreaded C programs. Many
other headers have gained thread-safe or re-rentrant versions
of existing functions that do not depend on shared state.
[: Much
more to be said here.]
Headers defined in C11
Names specified in C11
####define#elif#else#endif#error#if#ifdef#ifndef#include#line#pragma#undef__alignas_is_ defined __alignof_is_ defined __bool_true_ false_ are_ defined __DATE____FILE____func____LINE____STDC____STDC_ANALYZABLE__ __STDC_HOSTED__ __STDC_IEC_ 559__ __STDC_IEC_ 559_ COMPLEX__ __STDC_ISO_ 10646__ __STDC_LIB_ EXT1__ __STDC_MB_ MIGHT_ NEQ_ WC__ __STDC_NO_ ATOMICS__ __STDC_NO_ COMPLEX__ __STDC_NO_ THREADS__ __STDC_NO_ VLA__ __STDC_UTF_ 16__ __STDC_UTF_ 32__ __STDC_VERSION__ __STDC_WANT_ LIB_ EXT1__ __TIME____VA_ARGS__ _Alignas_Alignof_Atomic_Bool_Complex_Complex_I_Exit_Generic_Imaginary_Imaginary_I_IOFBF_IOLBF_IONBF_Noreturn_Pragma_Static_assert _Thread_local ATOMIC_BOOL_ LOCK_ FREE ATOMIC_CHAR16_ T_LOCK_ FREE ATOMIC_CHAR32_ T_LOCK_ FREE ATOMIC_CHAR_ LOCK_ FREE ATOMIC_FLAG_ INIT ATOMIC_INT_ LOCK_ FREE ATOMIC_LLONG_ LOCK_ FREE ATOMIC_LONG_ LOCK_ FREE ATOMIC_POINTER_ LOCK_ FREE ATOMIC_SHORT_ LOCK_ FREE ATOMIC_VAR_ INIT ATOMIC_WCHAR_ T_LOCK_ FREE abortabort_handler_s absacosacosacosfacoshacoshacoshfacoshlacoslalignasaligned_alloc alignofandand_eqasctimeasctime_sasinasinasinfasinhasinhasinhfasinhlasinlassertat_quick_ exit atanatanatan2atan2atan2fatan2latanfatanhatanhatanhfatanhlatanlatexitatofatoiatolatollatomicatomic_bool atomic_char atomic_char16_t atomic_char32_t atomic_compare_ exchange_ strong atomic_compare_ exchange_ strong_ explicit atomic_compare_ exchange_ weak atomic_compare_ exchange_ weak_ explicit atomic_exchange atomic_exchange_ explicit atomic_fetch_ add atomic_fetch_ add_ explicit atomic_fetch_ and atomic_fetch_ and_ explicit atomic_fetch_or atomic_fetch_ or_ explicit atomic_fetch_ sub atomic_fetch_ sub_ explicit atomic_fetch_ xor atomic_fetch_ xor_ explicit atomic_flag atomic_flag_ clear atomic_flag_ clear_ explicit atomic_flag_ test_ and_ set atomic_flag_ test_ and_ set_ explicit atomic_init atomic_int atomic_int_ fast16_t atomic_int_ fast32_t atomic_int_ fast64_t atomic_int_ fast8_t atomic_int_ least16_t atomic_int_ least32_t atomic_int_ least64_t atomic_int_ least8_t atomic_intmax_t atomic_intptr_t atomic_is_ lock_ free atomic_llong atomic_load atomic_load_ explicit atomic_long atomic_ptrdiff_t atomic_schar atomic_short atomic_signal_ fence atomic_size_t atomic_store atomic_store_ explicit atomic_thread_ fence atomic_uchar atomic_uint atomic_uint_ fast16_t atomic_uint_ fast32_t atomic_uint_ fast64_t atomic_uint_ fast8_t atomic_uint_ least16_t atomic_uint_ least32_t atomic_uint_ least64_t atomic_uint_ least8_t atomic_uintmax_t atomic_uintptr_t atomic_ullong atomic_ulong atomic_ushort atomic_wchar_t autoBUFSIZbitandbitorboolbreakbreakbreakbsearchbsearch_sbtowcCHAR_BIT CHAR_MAX CHAR_MIN CLOCKS_PER_ SEC CMPLXCMPLXFCMPLXLCX_LIMITED_ RANGE c16rtombc32rtombcabscabsfcabslcacoscacosfcacoshcacoshfcacoshlcacoslcall_once calloccargcargcargfcarglcasecasincasinfcasinhcasinhfcasinhlcasinlcatancatanfcatanhcatanhfcatanhlcatanlcbrtcbrtcbrtfcbrtlccosccosfccoshccoshfccoshlccoslceilceilceilfceillcexpcexpfcexplcharcharchar16_tchar32_tcimagcimagcimagfcimaglclearerrclockclock_tclogclogfcloglcnd_broadcast cnd_destroy cnd_init cnd_signal cnd_tcnd_timedwait cnd_wait complcomplexconjconjconjfconjlconstconstraint_handler_t continuecopysigncopysigncopysignfcopysignlcoscoscosfcoshcoshcoshfcoshlcoslcpowcpowfcpowlcprojcprojcprojfcprojlcrealcrealcrealfcreallcsincsinfcsinhcsinhfcsinhlcsinlcsqrtcsqrtfcsqrtlctanctanfctanhctanhfctanhlctanlctimectime_sDBL_DECIMAL_ DIG DBL_DIG DBL_EPSILON DBL_HAS_ SUBNORM DBL_MANT_ DIG DBL_MAX DBL_MAX_ 10_ EXP DBL_MAX_ EXP DBL_MIN DBL_MIN_ 10_ EXP DBL_MIN_ EXP DBL_TRUE_ MIN DECIMAL_DIG defaultdefaultdefaultdefineddifftimedivdiv_tdodoubledoubledouble _Complexdouble _Imaginarydouble complexdouble imaginarydouble_tEDOMEILSEQEOFERANGEEXIT_FAILURE EXIT_SUCCESS elseenumerferferfcerfcerfcferfclerfferflerrnoerrno_texitexpexpexp2exp2exp2fexp2lexpfexplexpm1expm1expm1fexpm1lexternFE_ALL_ EXCEPT FE_DFL_ ENV FE_DIVBYZERO FE_DOWNWARD FE_INEXACT FE_INVALID FE_OVERFLOW FE_TONEAREST FE_TOWARDZERO FE_UNDERFLOW FE_UPWARD FENV_ACCESS FILE *FILENAME_MAX FLT_DECIMAL_ DIG FLT_DIG FLT_EPSILON FLT_EVAL_ METHOD FLT_HAS_ SUBNORM FLT_MANT_ DIG FLT_MAX FLT_MAX_ 10_ EXP FLT_MAX_ EXP FLT_MIN FLT_MIN_ 10_ EXP FLT_MIN_ EXP FLT_RADIX FLT_ROUNDS FLT_TRUE_ MIN FOPEN_MAX FP_CONTRACT FP_FAST_ FMA FP_FAST_ FMAF FP_FAST_ FMAL FP_ILOGB0 FP_ILOGBNAN FP_INFINITE FP_NAN FP_NORMAL FP_SUBNORMAL FP_ZERO fabsfabsfabsffabslfalsefclosefdimfdimfdimffdimlfeclearexceptfegetenvfegetexceptflagfegetroundfeholdexceptfenv_tfeofferaiseexceptferrorfesetenvfesetexceptflagfesetroundfetestexceptfeupdateenvfexcept_tfflushfgetcfgetposfgetsfgetwcfgetwsfloatfloatfloat _Complexfloat _Imaginaryfloat complexfloat imaginaryfloat_tfloorfloorfloorffloorlfmafmafmaffmalfmaxfmaxfmaxffmaxlfminfminfminffminlfmodfmodfmodffmodlfopenfopen_sforfpclassifyfpos_tfprintffprintf_sfputcfputsfputwcfputwsfreadfreefreopenfreopen_sfrexpfrexpfrexpffrexplfscanffscanf_sfseekfsetposftellfwidefwprintffwprintf_sfwritefwscanffwscanf_sgetcgetchargetenvgetenv_sgets_sgetwcgetwchargmtimegmtime_sgotoHUGE_VAL HUGE_VALF HUGE_VALL hypothypothypotfhypotlIINFINITYINT16_CINT16_MAX INT16_MIN INT32_CINT32_MAX INT32_MIN INT64_CINT64_MAX INT64_MIN INT8_CINT8_MAX INT8_MIN INT_FAST16_ MAX INT_FAST16_ MIN INT_FAST32_ MAX INT_FAST32_ MIN INT_FAST64_ MAX INT_FAST64_ MIN INT_FAST8_ MAX INT_FAST8_ MIN INT_LEAST16_ MAX INT_LEAST16_ MIN INT_LEAST32_ MAX INT_LEAST32_ MIN INT_LEAST64_ MAX INT_LEAST64_ MIN INT_LEAST8_ MAX INT_LEAST8_ MIN INT_MAX INT_MIN INTMAX_CINTMAX_MAX INTMAX_MIN INTPTR_MAX INTPTR_MIN ifignore_handler_s ilogbilogbilogbfilogblimaginaryimaxabsimaxdivimaxdiv_tinlineintintint16_tint32_tint64_tint8_tint_fast16_t int_fast32_t int_fast64_t int_fast8_t int_least16_t int_least32_t int_least64_t int_least8_t intmax_tintptr_tisalnumisalphaisblankiscntrlisdigitisfiniteisgraphisgreaterisgreaterequalisinfislessislessequalislessgreaterislowerisnanisnormalisprintispunctisspaceisunorderedisupperiswalnumiswalphaiswblankiswcntrliswctypeiswdigitiswgraphiswloweriswprintiswpunctiswspaceiswupperiswxdigitisxdigitjmp_buf kill_dependency L_tmpnam L_tmpnam_s LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME LDBL_DECIMAL_ DIG LDBL_DIG LDBL_EPSILON LDBL_HAS_ SUBNORM LDBL_MANT_ DIG LDBL_MAX LDBL_MAX_ 10_ EXP LDBL_MAX_ EXP LDBL_MIN LDBL_MIN_ 10_ EXP LDBL_MIN_ EXP LDBL_TRUE_ MIN LLONG_MAX LLONG_MIN LONG_MAX LONG_MIN labsldexpldexpldexpfldexplldivldiv_tlgammalgammalgammaflgammalllabslldivlldiv_tllrintllrintllrintfllrintlllroundllroundllroundfllroundllocaleconvlocaltimelocaltime_slogloglog10log10log10flog10llog1plog1plog1pflog1pllog2log2log2flog2llogblogblogbflogbllogflogllonglonglong doublelong double _Complexlong double _Imaginarylong double complexlong double imaginarylong longlongjmplrintlrintlrintflrintllroundlroundlroundflroundlMATH_ERREXCEPT MATH_ERRNO MB_CUR_ MAX MB_LEN_ MAX mainmallocmath_errhandling max_align_t mblenmbrlenmbrtoc16mbrtoc32mbrtowcmbsinitmbsrtowcsmbsrtowcs_smbstate_tmbstowcsmbstowcs_smbtowcmemchrmemcmpmemcpymemcpy_smemmovememmove_smemory_order memory_order_ acq_ rel memory_order_ acquire memory_order_ consume memory_order_ relaxed memory_order_ release memory_order_ seq_ cst memsetmktimemodfmodfmodffmodflmtx_destroy mtx_init mtx_lock mtx_plain mtx_recursive mtx_tmtx_timed mtx_timedlock mtx_trylock mtx_unlock NANNDEBUGNULLnannanfnanlnearbyintnearbyintnearbyintfnearbyintlnextafternextafternextafterfnextafterlnexttowardnexttowardnexttowardfnexttowardlnoreturnnotnot_eqONCE_FLAG_ INIT offsetofonce_flag oror_eqPRId16PRId32PRId64PRId8PRIdFAST16PRIdFAST32PRIdFAST64PRIdFAST8PRIdLEAST16PRIdLEAST32PRIdLEAST64PRIdLEAST8PRIdMAXPRIdPTRPRIi16PRIi32PRIi64PRIi8PRIiFAST16PRIiFAST32PRIiFAST64PRIiFAST8PRIiLEAST16PRIiLEAST32PRIiLEAST64PRIiLEAST8PRIiMAXPRIiPTRPRIo16PRIo32PRIo64PRIo8PRIoFAST16PRIoFAST32PRIoFAST64PRIoFAST8PRIoLEAST16PRIoLEAST32PRIoLEAST64PRIoLEAST8PRIoMAXPRIoPTRPRIu16PRIu32PRIu64PRIu8PRIuFAST16PRIuFAST32PRIuFAST64PRIuFAST8PRIuLEAST16PRIuLEAST32PRIuLEAST64PRIuLEAST8PRIuMAXPRIuPTRPRIX16PRIX32PRIX64PRIX8PRIXFAST16PRIXFAST32PRIXFAST64PRIXFAST8PRIXLEAST16PRIXLEAST32PRIXLEAST64PRIXLEAST8PRIXMAXPRIXPTRPRIx16PRIx32PRIx64PRIx8PRIxFAST16PRIxFAST32PRIxFAST64PRIxFAST8PRIxLEAST16PRIxLEAST32PRIxLEAST64PRIxLEAST8PRIxMAXPRIxPTRPTRDIFF_MAX PTRDIFF_MIN perrorpowpowpowfpowlprintfprintf_sptrdiff_tputcputcharputsputwcputwcharqsortqsort_squick_exit RAND_MAX RSIZE_MAX raiserandreallocregisterremainderremainderremainderfremainderlremoveremquoremquoremquofremquolrenamerestrictreturnrewindrintrintrintfrintlroundroundroundfroundlrsize_tSCHAR_MAX SCHAR_MIN SCNd16SCNd32SCNd64SCNd8SCNdFAST16SCNdFAST32SCNdFAST64SCNdFAST8SCNdLEAST16SCNdLEAST32SCNdLEAST64SCNdLEAST8SCNdMAXSCNdPTRSCNi16SCNi32SCNi64SCNi8SCNiFAST16SCNiFAST32SCNiFAST64SCNiFAST8SCNiLEAST16SCNiLEAST32SCNiLEAST64SCNiLEAST8SCNiMAXSCNiPTRSCNo16SCNo32SCNo64SCNo8SCNoFAST16SCNoFAST32SCNoFAST64SCNoFAST8SCNoLEAST16SCNoLEAST32SCNoLEAST64SCNoLEAST8SCNoMAXSCNoPTRSCNu16SCNu32SCNu64SCNu8SCNuFAST16SCNuFAST32SCNuFAST64SCNuFAST8SCNuLEAST16SCNuLEAST32SCNuLEAST64SCNuLEAST8SCNuMAXSCNuPTRSCNx16SCNx32SCNx64SCNx8SCNxFAST16SCNxFAST32SCNxFAST64SCNxFAST8SCNxLEAST16SCNxLEAST32SCNxLEAST64SCNxLEAST8SCNxMAXSCNxPTRSEEK_CUR SEEK_END SEEK_SET SHRT_MAX SHRT_MIN SIG_ATOMIC_ MAX SIG_ATOMIC_ MIN SIG_DFL SIG_ERR SIG_IGN SIGABRTSIGFPESIGILLSIGINTSIGSEGVSIGTERMSIZE_MAX scalblnscalblnscalblnfscalblnlscalbnscalbnscalbnfscalbnlscanfscanf_sset_constraint_ handler_s setbufsetjmpsetlocalesetvbufshortshortsig_atomic_t signalsignbitsignedsigned charsinsinsinfsinhsinhsinhfsinhlsinlsize_tsizeofsnprintfsnprintf_ssnwprintf_ssprintfsprintf_ssqrtsqrtsqrtfsqrtlsrandsscanfsscanf_sstaticstaticstaticstaticstaticstatic_assert stderrstdinstdoutstrcatstrcat_sstrchrstrcmpstrcollstrcpystrcpy_sstrcspnstrerrorstrerror_sstrerrorlen_sstrftimestrlenstrncatstrncat_sstrncmpstrncpystrncpy_sstrnlen_sstrpbrkstrrchrstrspnstrstrstrtodstrtofstrtoimaxstrtokstrtok_sstrtolstrtoldstrtollstrtoulstrtoullstrtoumaxstructstruct lconvstruct timespecstruct tmstrxfrmswitchswprintfswprintf_sswscanfswscanf_ssystemTIME_UTC TMP_MAX TMP_MAX_S TSS_DTOR_ ITERATIONS tantantanftanhtanhtanhftanhltanltgammatgammatgammaftgammalthrd_busy thrd_create thrd_current thrd_detach thrd_equal thrd_error thrd_exit thrd_join thrd_nomem thrd_sleep thrd_start_t thrd_success thrd_tthrd_timedout thrd_yield thread_local timetime_ttimespec_get tmpfiletmpfile_stmpnamtmpnam_stolowertouppertowctranstowlowertowuppertruetrunctrunctruncftruncltss_create tss_delete tss_dtor_t tss_get tss_set tss_ttypedefUCHAR_MAX UINT16_CUINT16_MAX UINT32_CUINT32_MAX UINT64_CUINT64_MAX UINT8_CUINT8_MAX UINT_FAST16_ MAX UINT_FAST32_ MAX UINT_FAST64_ MAX UINT_FAST8_ MAX UINT_LEAST16_ MAX UINT_LEAST32_ MAX UINT_LEAST64_ MAX UINT_LEAST8_ MAX UINT_MAX UINTMAX_CUINTMAX_MAX UINTPTR_MAX ULLONG_MAX ULONG_MAX USHRT_MAX uint16_tuint32_tuint64_tuint8_tuint_fast16_t uint_fast32_t uint_fast64_t uint_fast8_t uint_least16_t uint_least32_t uint_least64_t uint_least8_t uintmax_tuintptr_tungetcungetwcunionunsignedunsignedunsigned charunsigned longunsigned long longunsigned shortva_arg va_copy va_end va_list va_start vfprintfvfprintf_svfscanfvfscanf_svfwprintfvfwprintf_svfwscanfvfwscanf_svoidvoidvoidvoidvoid *volatilevprintfvprintf_svscanfvscanf_svsnprintfvsnprintf_svsnwprintf_svsprintfvsprintf_svsscanfvsscanf_svswprintfvswprintf_svswscanfvswscanf_svwprintfvwprintf_svwscanfvwscanf_sWCHAR_MAX WCHAR_MIN WEOFWINT_MAX WINT_MIN wchar_twcrtombwcrtomb_swcscatwcscat_swcschrwcscmpwcscollwcscpywcscpy_swcscspnwcsftimewcslenwcsncatwcsncat_swcsncmpwcsncpywcsncpy_swcsnlen_swcspbrkwcsrchrwcsrtombswcsrtombs_swcsspnwcsstrwcstodwcstofwcstoimaxwcstokwcstok_swcstolwcstoldwcstollwcstombswcstombs_swcstoulwcstoullwcstoumaxwcsxfrmwctobwctombwctomb_swctranswctrans_twctypewctype_twhilewint_twmemchrwmemcmpwmemcpywmemcpy_swmemmovewmemmove_swmemsetwprintfwprintf_swscanfwscanf_sxorxor_eq
