Flashnux

GNU/Linux man pages

Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :

ISBN : 978-2-7460-9712-4
EAN : 9782746097124
(Editions ENI)

GNU/Linux

CentOS 4.8

i386

copysign(3)


COPYSIGN

COPYSIGN

NAME
SYNOPSIS
DESCRIPTION
NOTES
CONFORMING TO
SEE ALSO

NAME

copysign, copysignf, copysignl − copy sign of a number

SYNOPSIS

#include <math.h>

double copysign(double x, double y);
float copysignf(float
x, float y);
long double copysignl(long double
x, long double y);

DESCRIPTION

The copysign() functions return a value whose absolute value matches that of x, but whose sign matches that of y. If x is a NaN, then a NaN with the sign of y is returned.

NOTES

The copysign() functions may treat a negative zero as positive.

CONFORMING TO

C99, BSD 4.3. This function is defined in IEC 559 (and the appendix with recommended functions in IEEE 754/IEEE 854).

SEE ALSO

signbit(3)



copysign(3)