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   significandf    ( 3 )

получить мантиссу числа с плавающей запятой (get mantissa of floating-point number)

Имя (Name)

significand, significandf, significandl - get mantissa of
       floating-point number

Синопсис (Synopsis)

#include <math.h>

double significand(double x); float significandf(float x); long double significandl(long double x);

Link with -lm.

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

significand(), significandf(), significandl(): /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE


Описание (Description)

These functions return the mantissa of x scaled to the range
       [1,2).  They are equivalent to

scalb(x, (double) -ilogb(x))

This function exists mainly for use in certain standardized tests for IEEE 754 conformance.


Атрибуты (Attributes)

For an explanation of the terms used in this section, see
       attributes(7).

┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface Attribute Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │significand(), significandf(), │ Thread safety │ MT-Safe │ │significandl() │ │ │ └──────────────────────────────────────┴───────────────┴─────────┘


Стандарты (Conforming to)

These functions are nonstandard; the double version is available
       on a number of other systems.

Смотри также (See also)

ilogb(3), scalb(3)