Standard C++ Library Reference ISO/IEC (VERSION3)

LDBL_MANT_DIG
#define LDBL_MANT_DIG <integer rvalue>
The macro yields the number of mantissa digits, base FLT_RADIX, for type long double.
LDBL_MAX
#define LDBL_MAX <long double rvalue >= 10^37>
The macro yields the largest finite representable value of type long double.
LDBL_MAX_10_EXP
#define LDBL_MAX_10_EXP <integer rvalue >= 37>
The macro yields the maximum integer X, such that 10^X is a finite representable value of type
long double.
LDBL_MAX_EXP
#define LDBL_MAX_EXP <integer rvalue>
The macro yields the maximum integer X, such that FLT_RADIX^(X - 1) is a finite
representable value of type long double.
LDBL_MIN
#define LDBL_MIN <long double rvalue <= 10^(-37)>
The macro yields the smallest normalized, finite representable value of type long double.
LDBL_MIN_10_EXP
#define LDBL_MIN_10_EXP <integer rvalue <= -37>
The macro yields the minimum integer X, such that 10^X is a normalized, finite representable
value of type long double.