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  • C library:

    • <cassert> (assert.h)
    • <cctype> (ctype.h)
    • <cerrno> (errno.h)
    • C++11
      <cfenv> (fenv.h)
    • <cfloat> (float.h)
    • C++11
      <cinttypes> (inttypes.h)
    • <ciso646> (iso646.h)
    • <climits> (limits.h)
    • <clocale> (locale.h)
    • <cmath> (math.h)
    • <csetjmp> (setjmp.h)
    • <csignal> (signal.h)
    • <cstdarg> (stdarg.h)
    • C++11
      <cstdbool> (stdbool.h)
    • <cstddef> (stddef.h)
    • C++11
      <cstdint> (stdint.h)
    • <cstdio> (stdio.h)
    • <cstdlib> (stdlib.h)
    • <cstring> (string.h)
    • C++11
      <ctgmath> (tgmath.h)
    • <ctime> (time.h)
    • C++11
      <cuchar> (uchar.h)
    • <cwchar> (wchar.h)
    • <cwctype> (wctype.h)

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      <array>
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      <unordered_set>
    • <vector>

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    • <bitset>
    • C++11
      <chrono>
    • C++11
      <codecvt>
    • <complex>
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      <initializer_list>
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    • C++11
      <random>
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      <ratio>
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      <regex>
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    • C++11
      <system_error>
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      <tuple>
    • C++11
      <type_traits>
    • C++11
      <typeindex>
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    • <utility>
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<cstddef> (stddef.h)

  • macros

    • NULL
    • offsetof

  • types

    • C++11
      max_align_t
    • C++11
      nullptr_t
    • ptrdiff_t
    • size_t
  • Reference
  • <cstddef>
header

<cstddef> (stddef.h)

C Standard definitions
This header defines several types implicitly generated or used by certain language expressions.

Types

ptrdiff_t
Result of pointer subtraction (type)
size_t
Unsigned integral type (type)
max_align_t
Type with widest scalar alignment (type)
nullptr_t
Null pointer type (C++) (type)

In C, this header also includes the declaration of the wchar_t type (wide character type), which in C++ is a language keyword that identifies a distinct fundamental type (no header inclusion required in C++).

Macro functions

offsetof
Return member offset (macro)

Macro constants

NULL
Null pointer (macro)
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