Difference between revisions of "cpp/types/climits"
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(Corrected description of <cstdint>'s *_MIN macros to read "minimum", not as "maximum" as before.) |
m (link to digits10 which explains FLT_DIG well) |
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{{dsc macro const | FLT_MAX<br>DBL_MAX<br>LDBL_MAX | maximum value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | {{dsc macro const | FLT_MAX<br>DBL_MAX<br>LDBL_MAX | maximum value of {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | ||
{{dsc macro const | FLT_EPSILON<br>DBL_EPSILON<br>LDBL_EPSILON | difference between {{c|1.0}} and the next representable value for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | {{dsc macro const | FLT_EPSILON<br>DBL_EPSILON<br>LDBL_EPSILON | difference between {{c|1.0}} and the next representable value for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | ||
| − | {{dsc macro const | FLT_DIG<br>DBL_DIG<br>LDBL_DIG | number of decimal digits that can be represented without losing precision for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | + | {{dsc macro const | FLT_DIG<br>DBL_DIG<br>LDBL_DIG | number of decimal digits that can be represented without losing precision for {{c|float}}, {{c|double}} and {{c|long double}} respectively (see {{lc|std::numeric_limits::digits10}} for explanation) | nolink=true }} |
{{dsc macro const | FLT_MANT_DIG<br>DBL_MANT_DIG<br>LDBL_MANT_DIG | number of base {{tt|FLT_RADIX}} digits that can be represented without losing precision for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | {{dsc macro const | FLT_MANT_DIG<br>DBL_MANT_DIG<br>LDBL_MANT_DIG | number of base {{tt|FLT_RADIX}} digits that can be represented without losing precision for {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | ||
{{dsc macro const | FLT_MIN_EXP<br>DBL_MIN_EXP<br>LDBL_MIN_EXP | minimum negative integer such that {{tt|FLT_RADIX}} raised by power one less than that integer is a normalized {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | {{dsc macro const | FLT_MIN_EXP<br>DBL_MIN_EXP<br>LDBL_MIN_EXP | minimum negative integer such that {{tt|FLT_RADIX}} raised by power one less than that integer is a normalized {{c|float}}, {{c|double}} and {{c|long double}} respectively | nolink=true }} | ||
Revision as of 07:44, 24 December 2013
See also std::numeric_limits interface.
| Defined in header
<cstdint> | |
| 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) |
Limits of integer types
| Defined in header
<climits> | |
| CHAR_BIT |
number of bits in 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) |
Limits of floating point types
| Defined in header
<cfloat> | |
| FLT_RADIX |
the radix (integer base) used by the representation of all three floating-point types (macro constant) |
| DECIMAL_DIG (C++11) |
number of decimal digits that can be converted to long double and back without losing precision (macro constant) |
| FLT_MINDBL_MINLDBL_MIN |
minimum 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 can be represented without losing precision for float, double and long double respectively (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) | |
| (C++11) |
specifies in what precision all arithmetic operations are done (macro constant) |
