This page tries to list all the symbols that are available from theStandard Library. The symbols are written as follows:

• Function names with().
• Generic function names (e.g.,atomics) marked with(generic).

Macro symbols are listed in a separated page.

[edit]

_ABCDEFGHIJLMNOPQRSTUVW

[edit]Macros

[edit]_ (underscore)

_Exit()(since C99)

[edit]A

abort()
abort_handler_s()(since C11)
abs()
acos()
acosf()(since C99)
acosh()(since C99)
acoshf()(since C99)
acoshl()(since C99)
acosl()(since C99)
aligned_alloc()(since C11)
asctime()(deprecated in C23)
asctime_s()(since C11)
asin()
asinf()(since C99)
asinh()(since C99)
asinhf()(since C99)
asinhl()(since C99)
asinl()(since C99)
at_quick_exit()(since C11)
atan()
atan2()
atan2f()(since C99)
atan2l()(since C99)
atanf()(since C99)
atanh()(since C99)
atanhf()(since C99)
atanhl()(since C99)
atanl()(since C99)
atexit()
atof()
atoi()
atol()
atoll()(since C99)

atomic_compare_exchange_strong()(generic)(since C11)
atomic_compare_exchange_strong_explicit()(generic)(since C11)
atomic_compare_exchange_weak()(generic)(since C11)
atomic_compare_exchange_weak_explicit()(generic)(since C11)
atomic_exchange()(generic)(since C11)
atomic_exchange_explicit()(generic)(since C11)
atomic_fetch_add()(generic)(since C11)
atomic_fetch_add_explicit()(generic)(since C11)
atomic_fetch_and()(generic)(since C11)
atomic_fetch_and_explicit()(generic)(since C11)
atomic_fetch_or()(generic)(since C11)
atomic_fetch_or_explicit()(generic)(since C11)
atomic_fetch_sub()(generic)(since C11)
atomic_fetch_sub_explicit()(generic)(since C11)
atomic_fetch_xor()(generic)(since C11)
atomic_fetch_xor_explicit()(generic)(since C11)
atomic_flag(since C11)
atomic_flag_clear()(since C11)
atomic_flag_clear_explicit()(since C11)
atomic_flag_test_and_set()(since C11)
atomic_flag_test_and_set_explicit()(since C11)
atomic_init()(generic)(since C11)
atomic_is_lock_free()(generic)(since C11)
atomic_load()(generic)(since C11)
atomic_load_explicit()(generic)(since C11)
atomic_signal_fence()(since C11)
atomic_store()(generic)(since C11)
atomic_store_explicit()(generic)(since C11)
atomic_thread_fence()(since C11)

[edit]B

bsearch()
bsearch_s()(since C11)
btowc()(since C95)

[edit]C

c16rtomb()(since C11)
c32rtomb()(since C11)
cabs()(since C99)
cabsf()(since C99)
cabsl()(since C99)
cacos()(since C99)
cacosf()(since C99)
cacosh()(since C99)
cacoshf()(since C99)
cacoshl()(since C99)
cacosl()(since C99)
call_once()(since C11)
calloc()
carg()(since C99)
cargf()(since C99)
cargl()(since C99)
casin()(since C99)
casinf()(since C99)
casinh()(since C99)
casinhf()(since C99)
casinhl()(since C99)
casinl()(since C99)
catan()(since C99)
catanf()(since C99)
catanh()(since C99)
catanhf()(since C99)
catanhl()(since C99)
catanl()(since C99)
cbrt()(since C99)
cbrtf()(since C99)
cbrtl()(since C99)
ccos()(since C99)
ccosf()(since C99)
ccosh()(since C99)
ccoshf()(since C99)
ccoshl()(since C99)
ccosl()(since C99)
ceil()
ceilf()(since C99)
ceill()(since C99)
cexp()(since C99)
cexpf()(since C99)
cexpl()(since C99)
char16_t(since C11)
char32_t(since C11)
cimag()(since C99)
cimagf()(since C99)
cimagl()(since C99)
clearerr()
clock()
clock_t
clog()(since C99)
clogf()(since C99)
clogl()(since C99)
cnd_broadcast()(since C11)
cnd_destroy()(since C11)
cnd_init()(since C11)
cnd_signal()(since C11)
cnd_t(since C11)
cnd_timedwait()(since C11)
cnd_wait()(since C11)
conj()(since C99)
conjf()(since C99)
conjl()(since C99)
constraint_handler_t(since C11)
copysign()(since C99)
copysignf()(since C99)
copysignl()(since C99)
cos()
cosf()(since C99)
cosh()
coshf()(since C99)
coshl()(since C99)
cosl()(since C99)
cpow()(since C99)
cpowf()(since C99)
cpowl()(since C99)
cproj()(since C99)
cprojf()(since C99)
cprojl()(since C99)
creal()(since C99)
crealf()(since C99)
creall()(since C99)
csin()(since C99)
csinf()(since C99)
csinh()(since C99)
csinhf()(since C99)
csinhl()(since C99)
csinl()(since C99)
csqrt()(since C99)
csqrtf()(since C99)
csqrtl()(since C99)
ctan()(since C99)
ctanf()(since C99)
ctanh()(since C99)
ctanhf()(since C99)
ctanhl()(since C99)
ctanl()(since C99)
ctime()(deprecated in C23)
ctime_s()(since C11)

[edit]D

difftime()
div()
div_t
double_t(since C99)

[edit]E

erf()(since C99)
erfc()(since C99)
erfcf()(since C99)
erfcl()(since C99)
erff()(since C99)
erfl()(since C99)
errno_t(since C11)
exit()
exp()
exp2()(since C99)
exp2f()(since C99)
exp2l()(since C99)
expf()(since C99)
expl()(since C99)
expm1()(since C99)
expm1f()(since C99)
expm1l()(since C99)

[edit]F

fabs()
fabsf()(since C99)
fabsl()(since C99)
fclose()
fdim()(since C99)
fdimf()(since C99)
fdiml()(since C99)
feclearexcept()(since C99)
fegetenv()(since C99)
fegetexceptflag()(since C99)
fegetround()(since C99)
feholdexcept()(since C99)
fenv_t(since C99)
feof()
feraiseexcept()(since C99)
ferror()
fesetenv()(since C99)
fesetexceptflag()(since C99)
fesetround()(since C99)
fetestexcept()(since C99)
feupdateenv()(since C99)
fexcept_t(since C99)
fflush()
fgetc()
fgetpos()
fgets()
fgetwc()(since C95)
fgetws()(since C95)
FILE
float_t(since C99)
floor()
floorf()(since C99)
floorl()(since C99)
fma()(since C99)
fmaf()(since C99)
fmal()(since C99)
fmax()(since C99)
fmaxf()(since C99)
fmaxl()(since C99)
fmin()(since C99)
fminf()(since C99)
fminl()(since C99)
fmod()
fmodf()(since C99)
fmodl()(since C99)
fopen()
fopen_s()(since C11)
fpos_t
fprintf()
fprintf_s()(since C11)
fputc()
fputs()
fputwc()(since C95)
fputws()(since C95)
fread()
free()
freopen()
freopen_s()(since C11)
frexp()
frexpf()(since C99)
frexpl()(since C99)
fscanf()
fscanf_s()(since C11)
fseek()
fsetpos()
ftell()
fwide()(since C95)
fwprintf()(since C95)
fwprintf_s()(since C11)
fwrite()
fwscanf()(since C95)
fwscanf_s()(since C11)

[edit]G

getc()
getchar()
getenv()
getenv_s()(since C11)
gets()(removed in C11)
gets_s()(since C11)
getwc()(since C95)
getwchar()(since C95)
gmtime()
gmtime_r()(since C23)
gmtime_s()(since C11)

[edit]H

hypot()(since C99)
hypotf()(since C99)
hypotl()(since C99)

[edit]I

ignore_handler_s()(since C11)
ilogb()(since C99)
ilogbf()(since C99)
ilogbl()(since C99)
imaxabs()(since C99)
imaxdiv()(since C99)
imaxdiv_t(since C99)

isalnum()
isalpha()
isblank()(since C99)
iscntrl()
isdigit()
isgraph()
islower()
isprint()
ispunct()
isspace()
isupper()
iswalnum()(since C95)
iswalpha()(since C95)
iswblank()(since C99)
iswcntrl()(since C95)
iswctype()(since C95)
iswdigit()(since C95)
iswgraph()(since C95)
iswlower()(since C95)
iswprint()(since C95)
iswpunct()(since C95)
iswspace()(since C95)
iswupper()(since C95)
iswxdigit()(since C95)
isxdigit()

[edit]J

jmp_buf

[edit]L

labs()
lconv
ldexp()
ldexpf()(since C99)
ldexpl()(since C99)
ldiv()
ldiv_t
lgamma()(since C99)
lgammaf()(since C99)
lgammal()(since C99)
llabs()(since C99)
lldiv()(since C99)
lldiv_t(since C99)
llrint()(since C99)
llrintf()(since C99)
llrintl()(since C99)
llround()(since C99)
llroundf()(since C99)
llroundl()(since C99)
localeconv()
localtime()
localtime_r()(since C23)
localtime_s()(since C11)
log()
log10()
log10f()(since C99)
log10l()(since C99)
log1p()(since C99)
log1pf()(since C99)
log1pl()(since C99)
log2()(since C99)
log2f()(since C99)
log2l()(since C99)
logb()(since C99)
logbf()(since C99)
logbl()(since C99)
logf()(since C99)
logl()(since C99)
longjmp()
lrint()(since C99)
lrintf()(since C99)
lrintl()(since C99)
lround()(since C99)
lroundf()(since C99)
lroundl()(since C99)

[edit]M

malloc()
max_align_t(since C11)
mblen()
mbrlen()(since C95)
mbrtoc16()(since C11)
mbrtoc32()(since C11)
mbrtowc()(since C95)
mbsinit()(since C95)
mbsrtowcs()(since C95)
mbsrtowcs_s()(since C11)
mbstate_t(since C95)
mbstowcs()(since C95)
mbstowcs_s()(since C11)
mbtowc()
memccpy()(since C23)
memchr()
memcmp()
memcpy()
memcpy_s()(since C11)
memmove()
memmove_s()(since C11)
memory_order(since C11)
memory_order_acq_rel(since C11)
memory_order_acquire(since C11)
memory_order_consume(since C11)
memory_order_relaxed(since C11)
memory_order_release(since C11)
memory_order_seq_cst(since C11)
memset()
memset_s()(since C11)
memset_explicit()(since C23)
mktime()
modf()
modff()(since C99)
modfl()(since C99)
mtx_destroy()(since C11)
mtx_init()(since C11)
mtx_lock()(since C11)
mtx_plain(since C11)
mtx_recursive(since C11)
mtx_t(since C11)
mtx_timed(since C11)
mtx_timedlock()(since C11)
mtx_trylock()(since C11)
mtx_unlock()(since C11)

[edit]N

nan()(since C99)
nanf()(since C99)
nanl()(since C99)
nearbyint()(since C99)
nearbyintf()(since C99)
nearbyintl()(since C99)
nextafter()(since C99)
nextafterf()(since C99)
nextafterl()(since C99)
nexttoward()(since C99)
nexttowardf()(since C99)
nexttowardl()(since C99)

[edit]O

once_flag(since C11)

[edit]P

perror()
pow()
powf()(since C99)
powl()(since C99)
printf()
printf_s()(since C11)
ptrdiff_t
putc()
putchar()
puts()
putwc()(since C95)
putwchar()(since C95)

[edit]Q

qsort()
qsort_s()(since C11)
quick_exit()(since C11)

[edit]R

raise()
rand()
realloc()
remainder()(since C99)
remainderf()(since C99)
remainderl()(since C99)
remove()
remquo()(since C99)
remquof()(since C99)
remquol()(since C99)
rename()
rewind()
rint()(since C99)
rintf()(since C99)
rintl()(since C99)
round()(since C99)
roundf()(since C99)
roundl()(since C99)
rsize_t(since C11)

[edit]S

scalbln()(since C99)
scalblnf()(since C99)
scalblnl()(since C99)
scalbn()(since C99)
scalbnf()(since C99)
scalbnl()(since C99)
scanf()
scanf_s()(since C11)
set_constraint_handler_s()(since C11)
setbuf()
setlocale()
setvbuf()
sig_atomic_t
signal()
sin()
sinf()(since C99)
sinh()
sinhf()(since C99)
sinhl()(since C99)
sinl()(since C99)
size_t
snprintf()(since C99)
snprintf_s()(since C11)
snwprintf_s()(since C11)
sprintf()
sprintf_s()(since C11)
sqrt()
sqrtf()(since C99)
sqrtl()(since C99)
srand()
sscanf()
sscanf_s()(since C11)
strcat()
strcat_s()(since C11)
strchr()
strcmp()
strcoll()
strcpy()
strcpy_s()(since C11)
strcspn()
strdup()(since C23)
strerror()
strerror_s()(since C11)
strerrorlen_s()(since C11)
strftime()
strlen()
strncat()
strncat_s()(since C11)
strncmp()
strncpy()
strncpy_s()(since C11)
strndup()(since C23)
strnlen_s()(since C11)
strpbrk()
strrchr()
strspn()
strstr()
strtod()
strtof()(since C99)
strtoimax()(since C99)
strtok()
strtok_s()(since C11)
strtol()
strtold()(since C99)
strtoll()(since C99)
strtoul()
strtoull()(since C99)
strtoumax()(since C99)
strxfrm()
swprintf()(since C95)
swprintf_s()(since C11)
swscanf()(since C95)
swscanf_s()(since C11)
system()

[edit]T

tan()
tanf()(since C99)
tanh()(since C99)
tanhf()(since C99)
tanhl()(since C99)
tanl()(since C99)
tgamma()(since C99)
tgammaf()(since C99)
tgammal()(since C99)
thrd_busy(since C11)
thrd_create()(since C11)
thrd_current()(since C11)
thrd_detach()(since C11)
thrd_equal()(since C11)
thrd_error(since C11)
thrd_exit()(since C11)
thrd_join()(since C11)
thrd_nomem(since C11)
thrd_sleep()(since C11)
thrd_start_t(since C11)
thrd_success(since C11)
thrd_t(since C11)
thrd_timedout(since C11)
thrd_yield()(since C11)
time()
time_t
timespec(since C11)
timespec_get()(since C11)
timespec_getres()(since C23)
tm
tmpfile()
tmpfile_s()(since C11)
tmpnam()
tmpnam_s()(since C11)
tolower()
toupper()
towctrans()(since C95)
towlower()(since C95)
towupper()(since C95)
trunc()(since C99)
truncf()(since C99)
truncl()(since C99)
tss_create()(since C11)
tss_delete()(since C11)
tss_dtor_t(since C11)
tss_get()(since C11)
tss_set()(since C11)
tss_t(since C11)

[edit]U

ungetc()
ungetwc()(since C95)

[edit]V

vfprintf()
vfprintf_s()(since C11)
vfscanf()(since C99)
vfscanf_s()(since C11)
vfwprintf()(since C95)
vfwprintf_s()(since C11)
vfwscanf()(since C99)
vfwscanf_s()(since C11)
vprintf()
vprintf_s()(since C11)
vscanf()(since C99)
vscanf_s()(since C11)
vsnprintf()(since C99)
vsnprintf_s()(since C11)
vsnwprintf_s()(since C11)
vsprintf()
vsprintf_s()(since C11)
vsscanf()(since C99)
vsscanf_s()(since C11)
vswprintf()(since C95)
vswprintf_s()(since C11)
vswscanf()(since C99)
vswscanf_s()(since C11)
vwprintf()(since C95)
vwprintf_s()(since C11)
vwscanf()(since C99)
vwscanf_s()(since C11)

[edit]W

wchar_t
wcrtomb()(since C95)
wcrtomb_s()(since C11)
wcscat()(since C95)
wcscat_s()(since C11)
wcschr()(since C95)
wcscmp()(since C95)
wcscoll()(since C95)
wcscpy()(since C95)
wcscpy_s()(since C11)
wcscspn()(since C95)
wcsftime()(since C95)
wcslen()(since C95)
wcsncat()(since C95)
wcsncat_s()(since C11)
wcsncmp()(since C95)
wcsncpy()(since C95)
wcsncpy_s()(since C11)
wcsnlen_s()(since C11)
wcspbrk()(since C95)
wcsrchr()(since C95)
wcsrtombs()(since C95)
wcsrtombs_s()(since C11)
wcsspn()(since C95)
wcsstr()(since C95)
wcstod()(since C95)
wcstof()(since C99)
wcstoimax()(since C99)
wcstok()(since C95)
wcstok_s()(since C11)
wcstol()(since C95)
wcstold()(since C99)
wcstoll()(since C99)
wcstombs()
wcstombs_s()(since C11)
wcstoul()(since C95)
wcstoull()(since C99)
wcstoumax()(since C99)
wcsxfrm()(since C95)
wctob()(since C95)
wctomb()
wctomb_s()(since C11)
wctrans()(since C95)
wctrans_t(since C95)
wctype()(since C95)
wctype_t(since C95)
wint_t(since C95)
wmemchr()(since C95)
wmemcmp()(since C95)
wmemcpy()(since C95)
wmemcpy_s()(since C11)
wmemmove()(since C95)
wmemmove_s()(since C11)
wmemset()(since C95)
wprintf()(since C95)
wprintf_s()(since C11)
wscanf()(since C95)
wscanf_s()(since C11)

[edit]See also

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