REMAINDER(3) | Library Functions Manual | REMAINDER(3) |
remainder
, remainderf
,
remquo
, remquof
—
#include <math.h>
double
remainder
(double
x, double y);
float
remainderf
(float
x, float y);
double
remquo
(double
x, double y,
int *quo);
float
remquof
(float
x, float y,
int *quo);
remainder
() and remainderf
()
functions calculate the floating-point remainder r of
where n is the integral value nearest to the exact value of x / y. If
the value n is chosen to be even. Consequently, the remainder is computed exactly and | r | ≤ | y | / 2 .
Also the remquo
() and
remquof
() functions calculate the remainder as
described above. But these additionally use quo to
store a value whose sign is the sign of x / y and
whose magnitude is congruent modulo 2^k to the
magnitude of the integral quotient of x / y, where
k is an implementation-defined integer greater than or
equal to 3.
The rationale of the remquo
() family of
functions relates to situations where only few bits of the quotient are
required. The exact representation of the quotient may not be meaningful
when x is large in magnitude compared to
y.
September 18, 2011 | NetBSD 9.2 |