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Visual Studio 2008
Visual Studio
Visual C++
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Libraries Reference
Run-Time Library
Alphabetical Function Reference
abort
abs, _abs64
access
_access, _waccess
_access_s, _waccess_s
acos, acosf
_aligned_free
_aligned_free_dbg
_aligned_malloc
_aligned_malloc_dbg
_aligned_msize
_aligned_msize_dbg
_aligned_offset_malloc
_aligned_offset_malloc_dbg
_aligned_offset_realloc
_aligned_offset_realloc_dbg
_aligned_offset_recalloc
_aligned_offset_recalloc_dbg
_aligned_realloc
_aligned_realloc_dbg
_aligned_recalloc
_aligned_recalloc_dbg
_alloca
asctime, _wasctime
asctime_s, _wasctime_s
asin, asinf
assert
_ASSERT, _ASSERTE Macros
atan, atanf, atan2, atan2f
atexit
_atodbl, _atodbl_l, _atoldbl, _atoldbl_l, _atoflt _atoflt_l
atof, _atof_l, _wtof, _wtof_l
atoi, _atoi_l, _wtoi, _wtoi_l
_atoi64, _atoi64_l, _wtoi64, _wtoi64_l
atol, _atol_l, _wtol, _wtol_l
_beginthread, _beginthreadex
Bessel Functions
Bessel Functions: _y0, _y1, _yn
Bessel Functions: _j0, _j1, _jn
bsearch
bsearch_s
btowc
_byteswap_uint64, _byteswap_ulong, _byteswap_ushort
cabs
_cabs
calloc
_calloc_dbg
ceil, ceilf
_cexit, _c_exit
cgets
_cgets, _cgetws
_cgets_s, _cgetws_s
chdir
_chdir, _wchdir
_chdrive
_chgsign, _chgsignl
chmod
_chmod, _wchmod
chsize
_chsize
_chsize_s
_clear87, _clearfp
clock
clearerr
clearerr_s
close
_close
_commit
_configthreadlocale
_control87, _controlfp, __control87_2
_controlfp_s
_copysign, _copysignl
cos, cosf, cosh, coshf
_countof Macro
cprintf
_cprintf, _cprintf_l, _cwprintf, _cwprintf_l
_cprintf_p, _cprintf_p_l, _cwprintf_p, _cwprintf_p_l
_cprintf_s, _cprintf_s_l, _cwprintf_s, _cwprintf_s_l
cputs
_cputs, _cputws
creat
_creat, _wcreat
_create_locale
_CrtCheckMemory
_CrtDbgBreak
_CrtDbgReport, _CrtDbgReportW
_CrtDoForAllClientObjects
_CrtDumpMemoryLeaks
_CrtGetAllocHook
_CrtGetDumpClient
_CrtGetReportHook
_CrtIsMemoryBlock
_CrtIsValidHeapPointer
_CrtIsValidPointer
_CrtMemCheckpoint
_CrtMemDifference
_CrtMemDumpAllObjectsSince
_CrtMemDumpStatistics
_CrtReportBlockType
_CrtSetAllocHook
_CrtSetBreakAlloc
_CrtSetDbgFlag
_CrtSetDebugFillThreshold
_CrtSetDumpClient
_CrtSetReportFile
_CrtSetReportHook
_CrtSetReportHook2, _CrtSetReportHookW2
_CrtSetReportMode
cscanf
_cscanf, _cscanf_l, _cwscanf, _cwscanf_l
_cscanf_s, _cscanf_s_l, _cwscanf_s, _cwscanf_s_l
ctime, _ctime32, _ctime64, _wctime, _wctime32, _wctime64
ctime_s, _ctime32_s, _ctime64_s, _wctime_s, _wctime32_s, _wctime64_s
cwait
_cwait
difftime, _difftime32, _difftime64
div
dup, dup2
_dup, _dup2
_dupenv_s, _wdupenv_s
_dupenv_s_dbg, _wdupenv_s_dbg
ecvt
_ecvt
_ecvt_s
_endthread, _endthreadex
eof
_eof
_exec, _wexec Functions
execl
_execl, _wexecl
execle
_execle, _wexecle
execlp
_execlp, _wexeclp
execlpe
_execlpe, _wexeclpe
execv
_execv, _wexecv
execve
_execve, _wexecve
execvp
_execvp, _wexecvp
execvpe
_execvpe, _wexecvpe
exit, _exit
exp, expf
_expand
_expand_dbg
fabs, fabsf
fclose, _fcloseall
_fclose_nolock
fcloseall
fcvt
_fcvt
_fcvt_s
fdopen
_fdopen, _wfdopen
feof
ferror
fflush
_fflush_nolock
fgetc, fgetwc
_fgetc_nolock, _fgetwc_nolock
fgetchar
_fgetchar, _fgetwchar
fgetpos
fgets, fgetws
filelength
_filelength, _filelengthi64
fileno
_fileno
_find, _wfind Functions
_findclose
_findfirst, _wfindfirst
_findnext, _wfindnext
_finite
Flag Directives
floor, floorf
flushall
_flushall
fmod, fmodf
fopen, _wfopen
fopen_s, _wfopen_s
Format Specification Fields: printf and wprintf Functions
Format Specification Fields: scanf and wscanf Functions
_fpclass
_fpieee_flt
_fpreset
fprintf, _fprintf_l, fwprintf, _fwprintf_l
_fprintf_p, _fprintf_p_l, _fwprintf_p, _fwprintf_p_l
fprintf_s, _fprintf_s_l, fwprintf_s, _fwprintf_s_l
fputc, fputwc
_fputc_nolock, _fputwc_nolock
fputchar
_fputchar, _fputwchar
fputs, fputws
fread
_fread_nolock
free
_free_dbg
_free_locale
_freea
freopen, _wfreopen
freopen_s, _wfreopen_s
frexp
fscanf, _fscanf_l, fwscanf, _fwscanf_l
fscanf_s, _fscanf_s_l, fwscanf_s, _fwscanf_s_l
fseek, _fseeki64
_fseek_nolock, _fseeki64_nolock
fsetpos
_fsopen, _wfsopen
_fstat, _fstat32, _fstat64, _fstati64, _fstat32i64, _fstat64i32
ftell, _ftelli64
_ftell_nolock, _ftelli64_nolock
_ftime, _ftime32, _ftime64
_ftime_s, _ftime32_s, _ftime64_s
_fullpath, _wfullpath
_fullpath_dbg, _wfullpath_dbg
_futime, _futime32, _futime64
fwide
fwrite
_fwrite_nolock
gcvt
_gcvt
_gcvt_s
_get_amblksiz
_get_current_locale
_get_daylight
_get_doserrno
_get_dstbias
_get_errno
_get_fileinfo
_get_fmode
_get_heap_handle
_get_osfhandle
_get_output_format
_get_pgmptr
_get_printf_count_output
_get_sbh_threshold
_get_terminate
_get_timezone
_get_tzname
_get_unexpected
_get_wpgmptr
getc, getwc
_getc_nolock, _getwc_nolock
getch
_getch, _getwch
_getch_nolock, _getwch_nolock
getchar, getwchar
_getchar_nolock, _getwchar_nolock
getche
_getche, _getwche
_getche_nolock, _getwche_nolock
getcwd
_getcwd, _wgetcwd
_getcwd_dbg, _wgetcwd_dbg
_getdcwd, _wgetdcwd
_getdcwd_dbg, _wgetdcwd_dbg
_getdcwd_nolock, _wgetdcwd_nolock
_getdiskfree
_getdrive
_getdrives
getenv, _wgetenv
getenv_s, _wgetenv_s
_getmaxstdio
_getmbcp
getpid
_getpid
gets, _getws
gets_s, _getws_s
getw
_getw
gmtime, _gmtime32, _gmtime64
_gmtime_s, _gmtime32_s, _gmtime64_s
_heapadd
_heapchk
_heapmin
_heapset
_heapwalk
hypot
_hypot, hypotf
inp, inpw
_inp, _inpw, _inpd
is, isw Routines
isalpha, iswalpha, _isalpha_l, _iswalpha_l
isalnum, iswalnum, _isalnum_l, _iswalnum_l
isascii
__isascii, iswascii
isatty
_isatty
iscntrl, iswcntrl, _iscntrl_l, _iswcntrl_l
_isctype, iswctype, _isctype_l, _iswctype_l
iscsym, iscsymf
__iscsym, __iswcsym, __iscsymf, __iswcsymf, _iscsym_l, _iswcsym_l, _iscsymf_l, _iswcsymf_l
isdigit, iswdigit, _isdigit_l, _iswdigit_l
isgraph, iswgraph, _isgraph_l, _iswgraph_l
isleadbyte, _isleadbyte_l
islower, iswlower, _islower_l, _iswlower_l
_ismbb Routines
_ismbbalnum, _ismbbalnum_l
_ismbbalpha, _ismbbalpha_l
_ismbbgraph, _ismbbgraph_l
_ismbbkalnum, _ismbbkalnum_l
_ismbbkana, _ismbbkana_l
_ismbbkprint, _ismbbkprint_l
_ismbbkpunct, _ismbbkpunct_l
_ismbblead, _ismbblead_l
_ismbbprint, _ismbbprint_l
_ismbbpunct, _ismbbpunct_l
_ismbbtrail, _ismbbtrail_l
_ismbc Routines
_ismbcalnum, _ismbcalnum_l, _ismbcalpha, _ismbcalpha_, _ismbcdigit, _ismbcdigit_l
_ismbcgraph, _ismbcgraph_l, _ismbcprint, _ismbcprint_l, _ismbcpunct, _ismbcpunct_l, _ismbcspace, _ismbcspace_l
_ismbchira, _ismbchira_l, _ismbckata, _ismbckata_l
_ismbcl0, _ismbcl0_l, _ismbcl1, _ismbcl1_l, _ismbcl2, _ismbcl2_l
_ismbclegal, _ismbclegal_l, _ismbcsymbol, _ismbcsymbol_l
_ismbclower, _ismbclower_l, _ismbcupper, _ismbcupper_l
_ismbslead, _ismbstrail, _ismbslead_l, _ismbstrail_l
_isnan
isxdigit, iswxdigit, _isxdigit_l, _iswxdigit_l
isupper, _isupper_l, iswupper, _iswupper_l
isspace, iswspace, _isspace_l, _iswspace_l
ispunct, iswpunct, _ispunct_l, _iswpunct_l
isprint, iswprint, _isprint_l, _iswprint_l
itoa
_itoa, _i64toa, _ui64toa, _itow, _i64tow, _ui64tow
_itoa_s, _i64toa_s, _ui64toa_s, _itow_s, _i64tow_s, _ui64tow_s
j0, j1, jn
kbhit
_kbhit
labs
ldexp
ldiv
lfind
_lfind
_lfind_s
localeconv
localtime, _localtime32, _localtime64
localtime_s, _localtime32_s, _localtime64_s
_lock_file
locking
_locking
log, logf, log10, log10f
_logb
longjmp
_lrotl, _lrotr
lsearch
_lsearch
_lsearch_s
lseek
_lseek, _lseeki64
ltoa
_ltoa, _ltow
_ltoa_s, _ltow_s
_makepath, _wmakepath
_makepath_s, _wmakepath_s
malloc
_malloc_dbg
_malloca
_matherr
__max
_mbbtombc, _mbbtombc_l
_mbbtype, _mbbtype_l
_mbccpy, _mbccpy_l
_mbccpy_s, _mbccpy_s_l
_mbcjistojms, _mbcjistojms_l, _mbcjmstojis, _mbcjmstojis_l
_mbclen, mblen, _mblen_l
_mbctohira, _mbctohira_l, _mbctokata, _mbctokata_l
_mbctolower, _mbctolower_l, _mbctoupper, _mbctoupper_l
_mbctombb, _mbctombb_l
mbrlen
mbrtowc
_mbsbtype, _mbsbtype_l
_mbsdec, _mbsdec_l, _strdec, _wcsdec
_mbsinc, _mbsinc_l, _strinc, _wcsinc
mbsinit
_mbsnbcat, _mbsnbcat_l
_mbsnbcat_s, _mbsnbcat_s_l
_mbsnbcmp, _mbsnbcmp_l
_mbsnbcnt, _mbsnbcnt_l, _mbsnccnt, _mbsnccnt_l, _strncnt, _wcsncnt
_mbsnbcoll, _mbsnbcoll_l, _mbsnbicoll, _mbsnbicoll_l
_mbsnbcpy, _mbsnbcpy_l
_mbsnbcpy_s, _mbsnbcpy_s_l
_mbsnbicmp, _mbsnbicmp_l
_mbsnbset, _mbsnbset_l
_mbsnbset_s, _mbsnbset_s_l
_mbsnextc, _mbsnextc_l, _strnextc, _wcsnextc
_mbsninc, _mbsninc_l, _strninc, _wcsninc
_mbsspnp, _mbsspnp_l, _strspnp, _wcsspnp
mbsrtowcs
mbsrtowcs_s
mbstowcs, _mbstowcs_l
mbstowcs_s, _mbstowcs_s_l
mbtowc, _mbtowc_l
memccpy
_memccpy
memchr, wmemchr
memcmp, wmemcmp
memcpy, wmemcpy
memcpy_s, wmemcpy_s
memicmp
_memicmp, _memicmp_l
memmove, wmemmove
memmove_s, wmemmove_s
memset, wmemset
__min
mkdir
_mkdir, _wmkdir
_mkgmtime, _mkgmtime32, _mkgmtime64
mktemp
_mktemp, _wmktemp
_mktemp_s, _wmktemp_s
mktime, _mktime32, _mktime64
modf, modff
_msize
_msize_dbg
_nextafter
offsetof
_onexit, _onexit_m
open
_open, _wopen
_open_osfhandle
operator new[]
operator new
operator delete[]
operator delete
outp, outpw
_outp, _outpw, _outpd
_pclose
perror, _wperror
_pipe
_popen, _wpopen
pow, powf
Precision Specification
printf Type Field Characters
printf Width Specification
printf, _printf_l, wprintf, _wprintf_l
printf_p Positional Parameters
_printf_p, _printf_p_l, _wprintf_p, _wprintf_p_l
printf_s, _printf_s_l, wprintf_s, _wprintf_s_l
putc, putwc
_putc_nolock, _putwc_nolock
putch
_putch, _putwch
_putch_nolock, _putwch_nolock
putchar, putwchar
_putchar_nolock, _putwchar_nolock
putenv
_putenv, _wputenv
_putenv_s, _wputenv_s
puts, _putws
putw
_putw
_query_new_handler
_query_new_mode
qsort
qsort_s
raise
rand
rand_s
read
_read
realloc
_realloc_dbg
_recalloc
_recalloc_dbg
remove, _wremove
rename, _wrename
_resetstkoflw
rewind
rmdir
_rmdir, _wrmdir
rmtmp
_rmtmp
_rotl, _rotl64, _rotr, _rotr64
_RPT, _RPTF, _RPTW, _RPTFW Macros
_RTC_GetErrDesc
_RTC_NumErrors
_RTC_SetErrorFunc
_RTC_SetErrorFuncW
_RTC_SetErrorType
_scalb
scanf Type Field Characters
scanf Width Specification
scanf, _scanf_l, wscanf, _wscanf_l
scanf_s, _scanf_s_l, wscanf_s, _wscanf_s_l
_scprintf, _scprintf_l, _scwprintf, _scwprintf_l
_scprintf_p, _scprintf_p_l, _scwprintf_p, _scwprintf_p_l
_searchenv, _wsearchenv
_searchenv_s, _wsearchenv_s
__security_init_cookie
_set_abort_behavior
_set_amblksiz
_set_controlfp
_set_doserrno
_set_errno
_set_error_mode
_set_fileinfo
_set_fmode
_set_invalid_parameter_handler
_set_new_handler
_set_new_mode
_set_output_format
_set_printf_count_output
_set_purecall_handler, _set_purecall_handler_m
_set_sbh_threshold
_set_SSE2_enable
_set_se_translator
set_terminate
set_unexpected
setbuf
setjmp
setlocale, _wsetlocale
_setmaxstdio
_setmbcp
setmode
_setmode
setvbuf
signal
sin, sinf, sinh, sinhf
Size Specification
_snprintf, _snprintf_l, _snwprintf, _snwprintf_l
_snprintf_s, _snprintf_s_l, _snwprintf_s, _snwprintf_s_l
_snscanf, _snscanf_l, _snwscanf, _snwscanf_l
_snscanf_s, _snscanf_s_l, _snwscanf_s, _snwscanf_s_l
sopen
_sopen, _wsopen
_sopen_s, _wsopen_s
_spawn, _wspawn Functions
spawnl
_spawnl, _wspawnl
spawnle
_spawnle, _wspawnle
spawnlp
_spawnlp, _wspawnlp
spawnlpe
_spawnlpe, _wspawnlpe
spawnv
_spawnv, _wspawnv
spawnve
_spawnve, _wspawnve
spawnvp
_spawnvp, _wspawnvp
spawnvpe
_spawnvpe, _wspawnvpe
_splitpath, _wsplitpath
_splitpath_s, _wsplitpath_s
sprintf, _sprintf_l, swprintf, _swprintf_l, __swprintf_l
_sprintf_p, _sprintf_p_l, _swprintf_p, _swprintf_p_l
sprintf_s, _sprintf_s_l, swprintf_s, _swprintf_s_l
sqrt, sqrtf
srand
sscanf, _sscanf_l, swscanf, _swscanf_l
sscanf_s, _sscanf_s_l, swscanf_s, _swscanf_s_l
_stat, _wstat Functions
_STATIC_ASSERT Macro
_status87, _statusfp, _statusfp2
strcat, wcscat, _mbscat
strcat_s, wcscat_s, _mbscat_s
strchr, wcschr, _mbschr, _mbschr_l
strcmp, wcscmp, _mbscmp
strcmpi
strcoll Functions
strcoll, wcscoll, _mbscoll, _strcoll_l, _wcscoll_l, _mbscoll_l
strcpy, wcscpy, _mbscpy
strcpy_s, wcscpy_s, _mbscpy_s
strcspn, wcscspn, _mbscspn, _mbscspn_l
_strdate, _wstrdate
_strdate_s, _wstrdate_s
strdup, wcsdup
_strdup, _wcsdup, _mbsdup
_strdup_dbg, _wcsdup_dbg
strerror, _strerror, _wcserror, __wcserror
strerror_s, _strerror_s, _wcserror_s, __wcserror_s
strftime, wcsftime, _strftime_l, _wcsftime_l
stricmp, wcsicmp
_stricmp, _wcsicmp, _mbsicmp, _stricmp_l, _wcsicmp_l, _mbsicmp_l
_stricoll, _wcsicoll, _mbsicoll, _stricoll_l, _wcsicoll_l, _mbsicoll_l
String to Numeric Value Functions
strlen, strlen_l, wcslen, wcslen_l, _mbslen, _mbslen_l, _mbstrlen, _mbstrlen_l
strlwr, wcslwr
_strlwr, _wcslwr, _mbslwr, _strlwr_l, _wcslwr_l, _mbslwr_l
_strlwr_s, _strlwr_s_l, _mbslwr_s, _mbslwr_s_l, _wcslwr_s, _wcslwr_s_l
strncat, _strncat_l, wcsncat, wcsncat_l, _mbsncat _mbsncat_l
strncat_s, _strncat_s_l, wcsncat_s, _wcsncat_s_l, _mbsncat_s, _mbsncat_s_l
strncmp, wcsncmp, _mbsncmp, _mbsncmp_l
_strncoll, _wcsncoll, _mbsncoll, _strncoll_l, _wcsncoll_l, _mbsncoll_l
strncpy, _strncpy_l, wcsncpy, _wcsncpy_l, _mbsncpy, _mbsncpy_l
strncpy_s, _strncpy_s_l, wcsncpy_s, _wcsncpy_s_l, _mbsncpy_s, _mbsncpy_s_l
strnicmp, wcsnicmp
_strnicmp, _wcsnicmp, _mbsnicmp, _strnicmp_l, _wcsnicmp_l, _mbsnicmp_l
_strnicoll, _wcsnicoll, _mbsnicoll, _strnicoll_l, _wcsnicoll_l, _mbsnicoll_l
strnlen, strnlen_s, strnlen_l, wcsnlen, wcsnlen_s, wcsnlen_l, _mbsnlen, _mbsnlen_l, _mbstrnlen, _mbstrnlen_l
strnset, wcsnset
_strnset, _strnset_l, _wcsnset, _wcsnset_l, _mbsnset, _mbsnset_l
_strnset_s, _strnset_s_l, _wcsnset_s, _wcsnset_s_l, _mbsnset_s, _mbsnset_s_l
strpbrk, wcspbrk, _mbspbrk, _mbspbrk_l
strrchr, wcsrchr, _mbsrchr, _mbsrchr_l
strrev, wcsrev
_strrev, _wcsrev, _mbsrev, _mbsrev_l
strset, wcsset
_strset, _strset_l, _wcsset, _wcsset_l, _mbsset, _mbsset_l
_strset_s, _strset_s_l, _wcsset_s, _wcsset_s_l, _mbsset_s, _mbsset_s_l
strspn, wcsspn, _mbsspn, _mbsspn_l
strstr, wcsstr, _mbsstr, _mbsstr_l
_strtime, _wstrtime
_strtime_s, _wstrtime_s
strtod, _strtod_l, wcstod, _wcstod_l
_strtoi64, _wcstoi64, _strtoi64_l, _wcstoi64_l
strtok, _strtok_l, wcstok, _wcstok_l, _mbstok, _mbstok_l
strtok_s, _strtok_s_l, wcstok_s, _wcstok_s_l, _mbstok_s, _mbstok_s_l
strtol, wcstol, _strtol_l, _wcstol_l
strtoul, _strtoul_l, wcstoul, _wcstoul_l
_strtoui64, _wcstoui64, _strtoui64_l, _wcstoui64_l
strupr, wcsupr
_strupr, _strupr_l, _mbsupr, _mbsupr_l, _wcsupr_l, _wcsupr
_strupr_s, _strupr_s_l, _mbsupr_s, _mbsupr_s_l, _wcsupr_s, _wcsupr_s_l
strxfrm, wcsxfrm, _strxfrm_l, _wcsxfrm_l
swab
_swab
system, _wsystem
tan, tanf, tanh, tanhf
tell
_tell, _telli64
tempnam
_tempnam, _wtempnam, tmpnam, _wtmpnam
_tempnam_dbg, _wtempnam_dbg
terminate
time, _time32, _time64
tmpfile
tmpfile_s
tmpnam_s, _wtmpnam_s
to Functions
toascii
__toascii
tolower, _tolower, towlower, _tolower_l, _towlower_l
toupper, _toupper, towupper, _toupper_l, _towupper_l
towctrans
tzset
_tzset
ultoa
_ultoa, _ultow
_ultoa_s, _ultow_s
umask
_umask
_umask_s
unexpected
ungetc, ungetwc
_ungetc_nolock, _ungetwc_nolock
ungetch
_ungetch, _ungetwch, _ungetch_nolock, _ungetwch_nolock
unlink
_unlink, _wunlink
_unlock_file
_utime, _utime32 _utime64, _wutime, _wutime32, _wutime64
va_arg, va_end, va_start
_vcprintf, _vcprintf_l, _vcwprintf, _vcwprintf_l
_vcprintf_p, _vcprintf_p_l, _vcwprintf_p, _vcwprintf_p_l
_vcprintf_s, _vcprintf_s_l, _vcwprintf_s, _vcwprintf_s_l
vfprintf, _vfprintf_l, vfwprintf, _vfwprintf_l
_vfprintf_p, _vfprintf_p_l, _vfwprintf_p, _vfwprintf_p_l
vfprintf_s, _vfprintf_s_l, vfwprintf_s, _vfwprintf_s_l
vprintf Functions
vprintf, _vprintf_l, vwprintf, _vwprintf_l
_vprintf_p, _vprintf_p_l, _vwprintf_p, _vwprintf_p_l
vprintf_s, _vprintf_s_l, vwprintf_s, _vwprintf_s_l
_vscprintf, _vscprintf_l, _vscwprintf, _vscwprintf_l
_vscprintf_p, _vscprintf_p_l, _vscwprintf_p, _vscwprintf_p_l
vsnprintf, _vsnprintf, _vsnprintf_l, _vsnwprintf, _vsnwprintf_l
vsnprintf_s, _vsnprintf_s, _vsnprintf_s_l, _vsnwprintf_s, _vsnwprintf_s_l
vsprintf, _vsprintf_l, vswprintf, _vswprintf_l, __vswprintf_l
_vsprintf_p, _vsprintf_p_l, _vswprintf_p, _vswprintf_p_l
vsprintf_s, _vsprintf_s_l, vswprintf_s, _vswprintf_s_l
wcrtomb
wcrtomb_s
wcsrtombs
wcsrtombs_s
wcstombs, _wcstombs_l
wcstombs_s, _wcstombs_s_l
wctob
wctomb, _wctomb_l
wctomb_s, _wctomb_s_l
wctrans
wctype
write
_write
wcsicoll
y0, y1, yn
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_isatty

Visual Studio 2008

Updated: October 2008

Determines whether a file descriptor is associated with a character device.

Copy 
int _isatty( 
   int fd  
);
fd

File descriptor referring to the device to be tested.

_isatty returns a nonzero value if the descriptor is associated with a character device. Otherwise, _isatty returns 0.

The _isatty function determines whether fd is associated with a character device (a terminal, console, printer, or serial port).

This function validates the fd parameter. If fd is a bad file pointer, the invalid parameter handler is invoked, as described in Parameter Validation. If execution is allowed to continue, the function returns 0 and sets errno to EBADF.

Routine

Required header

_isatty

<io.h>

For more compatibility information, see Compatibility in the Introduction.

Libraries

All versions of the C run-time libraries.

Copy 
// crt_isatty.c
/* This program checks to see whether
 * stdout has been redirected to a file.
 */

#include <stdio.h>
#include <io.h>

int main( void )
{
   if( _isatty( _fileno( stdout ) ) )
      printf( "stdout has not been redirected to a file\n" );
   else
      printf( "stdout has been redirected to a file\n");
}
Copy 
stdout has not been redirected to a file

Date

History

Reason

October 2008

Removed incorrect .NET equivalents.

Customer feedback.

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