significand, significandf, significandl - get mantissa of floating-point number
#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 versions <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
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.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| significand (), significandf (), significandl () |
Thread safety |
MT-Safe |
These functions are nonstandard; the
double version is available on a
number of other systems.
ilogb(3),
scalb(3)