B.6 Characteristics of floating types <float.h>
FLT_ROUNDS DBL_MIN_EXP FLT_MAX
FLT_EVAL_METHOD LDBL_MIN_EXP DBL_MAX
FLT_RADIX FLT_MIN_10_EXP LDBL_MAX
FLT_MANT_DIG DBL_MIN_10_EXP FLT_EPSILON
DBL_MANT_DIG LDBL_MIN_10_EXP DBL_EPSILON
LDBL_MANT_DIG FLT_MAX_EXP LDBL_EPSILON
DECIMAL_DIG DBL_MAX_EXP FLT_MIN
FLT_DIG LDBL_MAX_EXP DBL_MIN
DBL_DIG FLT_MAX_10_EXP LDBL_MIN
LDBL_DIG DBL_MAX_10_EXP
FLT_MIN_EXP LDBL_MAX_10_EXP