See also std::numeric_limits interface.
Defined in header <cstdint> |
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| PTRDIFF_MIN
(C++11) | minimum value of object of std::ptrdiff_t type (macro constant) |
| PTRDIFF_MAX
(C++11) | maximum value of object of std::ptrdiff_t type (macro constant) |
| SIZE_MAX
(C++11) | maximum value of object of std::size_t type (macro constant) |
| SIG_ATOMIC_MIN
(C++11) | minimum value of object of std::sig_atomic_t type (macro constant) |
| SIG_ATOMIC_MAX
(C++11) | maximum value of object of std::sig_atomic_t type (macro constant) |
| WCHAR_MIN
(C++11) | minimum value of object of wchar_t type (macro constant) |
| WCHAR_MAX
(C++11) | maximum value of object of wchar_t type (macro constant) |
| WINT_MIN
(C++11) | minimum value of object of std::wint_t type (macro constant) |
| WINT_MAX
(C++11) | maximum value of object of std::wint_t type (macro constant) |
Defined in header <climits> |
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|---|---|
| CHAR_BIT | number of bits in a byte (macro constant) |
| MB_LEN_MAX | maximum number of bytes in a multibyte character (macro constant) |
| CHAR_MIN | minimum value of char (macro constant) |
| CHAR_MAX | maximum value of char (macro constant) |
| SCHAR_MINSHRT_MININT_MINLONG_MINLLONG_MIN
(C++11) | minimum value of signed char, short, int, long and long long respectively (macro constant) |
| SCHAR_MAXSHRT_MAXINT_MAXLONG_MAXLLONG_MAX
(C++11) | maximum value of signed char, short, int, long and long long respectively (macro constant) |
| UCHAR_MAXUSHRT_MAXUINT_MAXULONG_MAXULLONG_MAX
(C++11) | maximum value of unsigned char, unsigned short, unsigned int,unsigned long and unsigned long long respectively (macro constant) |
Note: the types of these constants, other than CHAR_BIT and MB_LEN_MAX, are required to match the results of the integral promotions as applied to objects of the types they describe: CHAR_MAX may have type int or unsigned int, but never char. Similarly USHRT_MAX may not be of an unsigned type: its type may be int.
Defined in header <cfloat> |
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| FLT_RADIX | the radix (integer base) used by the representation of all three floating-point types (macro constant) |
| DECIMAL_DIG
(C++11) | conversion from long double to decimal with at least DECIMAL_DIG digits and back to long double is the identity conversion. : this is the decimal precision required to serialize/deserialize a long double (see also std::numeric_limits::max_digits10) (macro constant) |
| FLT_DECIMAL_DIGDBL_DECIMAL_DIGLDBL_DECIMAL_DIG
(C++17) | conversion from float/double/long double to decimal with at least FLT_DECIMAL_DIG/DBL_DECIMAL_DIG/LDBL_DECIMAL_DIG digits and back is the identity conversion. : this is the decimal precision required to serialize/deserialize a floating-point value (see also std::numeric_limits::max_digits10). Defined to at least 6, 10, and 10 respectively, or 9 for IEEE float and 17 for IEEE double. (macro constant) |
| FLT_MINDBL_MINLDBL_MIN | minimum normalized positive value of float, double and long double respectively (macro constant) |
| FLT_TRUE_MINDBL_TRUE_MINLDBL_TRUE_MIN
(C++17) | minimum positive value of float, double and long double respectively (macro constant) |
| FLT_MAXDBL_MAXLDBL_MAX | maximum value of float, double and long double respectively (macro constant) |
| FLT_EPSILONDBL_EPSILONLDBL_EPSILON | difference between 1.0 and the next representable value for float, double and long double respectively (macro constant) |
| FLT_DIGDBL_DIGLDBL_DIG | number of decimal digits that are guaranteed to be preserved in text -> float/double/long double -> text roundtrip without change due to rounding or overflow (see std::numeric_limits::digits10 for explanation) (macro constant) |
| FLT_MANT_DIGDBL_MANT_DIGLDBL_MANT_DIG | number of base FLT_RADIX digits that can be represented without losing precision for float, double and long double respectively (macro constant) |
| FLT_MIN_EXPDBL_MIN_EXPLDBL_MIN_EXP | minimum negative integer such that FLT_RADIX raised by power one less than that integer is a normalized float, double and long double respectively (macro constant) |
| FLT_MIN_10_EXPDBL_MIN_10_EXPLDBL_MIN_10_EXP | minimum negative integer such that 10 raised by power one less than that integer is a normalized float, double and long double respectively (macro constant) |
| FLT_MAX_EXPDBL_MAX_EXPLDBL_MAX_EXP | maximum positive integer such that FLT_RADIX raised by power one more than that integer is a normalized float, double and long double respectively (macro constant) |
| FLT_MAX_10_EXPDBL_MAX_10_EXPLDBL_MAX_10_EXP | maximum positive integer such that 10 raised by power one more than that integer is a normalized float, double and long double respectively (macro constant) |
| default rounding mode of floating-point arithmetics (macro constant) |
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(C++11) | specifies in what precision all arithmetic operations are done (macro constant) |
| FLT_HAS_SUBNORMDBL_HAS_SUBNORMLDBL_HAS_SUBNORM
(C++17) | specifies whether the type supports subnormal (denormal) numbers: -1 indeterminable, 0 absent, 1 present (macro constant) |
C documentation for Numeric limits |
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