This header was originally in the C standard library as <float.h>.
This header is part of the type support library, in particular it's part of the C numeric limits interface.
Macros
| 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 (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) |
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