- [C] - atexit
- [C] - at_quick_exit
- [C] - exit
- [C] - EXIT_FAILURE
- [C] - EXIT_SUCCESS
- [C] - getenv
- [C] - getenv_s
- [C] - jmp_buf
- [C] - longjmp
- [C] - Program support utilities
- [C] - quick_exit
- [C] - raise
- [C] - setjmp
- [C] - SIGABRT
- [C] - SIGFPE
- [C] - SIGILL
- [C] - SIGINT
- [C] - signal
- [C] - SIGSEGV
- [C] - SIGTERM
- [C] - sig_atomic_t
- [C] - SIG_DFL
- [C] - SIG_ERR
- [C] - SIG_IGN
- [C] - system
- [C] - _Exit
- [C] - atof
- [C] - atoi
- [C] - atol
- [C] - atoll
- [C] - btowc
- [C] - c16rtomb
- [C] - c32rtomb
- [C] - char16_t
- [C] - char32_t
- [C] - isalnum
- [C] - isalpha
- [C] - isblank
- [C] - iscntrl
- [C] - isdigit
- [C] - isgraph
- [C] - islower
- [C] - isprint
- [C] - ispunct
- [C] - isspace
- [C] - isupper
- [C] - iswalnum
- [C] - iswalpha
- [C] - iswblank
- [C] - iswcntrl
- [C] - iswctype
- [C] - iswdigit
- [C] - iswgraph
- [C] - iswlower
- [C] - iswprint
- [C] - iswpunct
- [C] - iswspace
- [C] - iswupper
- [C] - iswxdigit
- [C] - isxdigit
- [C] - mblen
- [C] - mbrlen
- [C] - mbrtoc16
- [C] - mbrtoc32
- [C] - mbrtowc
- [C] - mbsinit
- [C] - mbsrtowcs
- [C] - mbsrtowcs_s
- [C] - mbstate_t
- [C] - mbstowcs
- [C] - mbstowcs_s
- [C] - mbtowc
- [C] - memchr
- [C] - memcmp
- [C] - memcpy
- [C] - memcpy_s
- [C] - memmove
- [C] - memmove_s
- [C] - memset
- [C] - memset_s
- [C] - Null-terminated byte strings
- [C] - Null-terminated multibyte strings
- [C] - Null-terminated wide strings
- [C] - strcat
- [C] - strcat_s
- [C] - strchr
- [C] - strcmp
- [C] - strcoll
- [C] - strcpy
- [C] - strcpy_s
- [C] - strcspn
- [C] - strerror
- [C] - strerrorlen_s
- [C] - strerror_s
- [C] - Strings library
- [C] - strlen
- [C] - strncat
- [C] - strncat_s
- [C] - strncmp
- [C] - strncpy
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