GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 4.8 |
i386 |
 |
drem(3) |
 |
drem, dremf, dreml, remainder, remainderf, remainderl − floating-point remainder function
#include <math.h>
/* The C99
versions */
double remainder(double x, double
y);
float remainderf(float x, float
y);
long double remainderl(long double x, long
double y);
/* Obsolete
synonyms */
double drem(double x, double y);
float dremf(float x, float y);
long double dreml(long double x, long
double y);
Link with −lm.
The remainder() function computes the remainder of dividing x by y. The return value is x - n * y, where n is the value x / y, rounded to the nearest integer. If this quotient is 1/2, it is rounded to the nearest even number (independent of the current rounding mode). If the return value is 0, it has the sign of x.
The drem() function does precisely the same thing.
The remainder() function returns the remainder, unless y is zero, when the function fails and errno is set.
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EDOM |
The denominator y is zero. |
IEC 60559. The three remainder*() functions are from C99. The function drem() is from BSD 4.3. The float and long double variants dremf() and dreml() exist on some systems, such as Tru64 and glibc2.
The call "remainder(29.0, 3.0)" returns −1.
fmod(3)
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drem(3) | |