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| COPYSIGN(3) | FreeBSD Library Functions Manual | COPYSIGN(3) |
NAME
copysign, copysignf,
copysignl —
copy sign
LIBRARY
Math Library (libm, -lm)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
Thecopysign(), copysignf() and
copysignl() functions return x
with its sign changed to y's.
SEE ALSO
fabs(3), fdim(3), ieee(3), math(3)STANDARDS
Thecopysign(), copysignf(), and
copysignl() routines conform to
ISO/IEC 9899:1999 (“ISO C99”).
They implement the Copysign function recommended by IEEE Std
754-1985.
HISTORY
Thecopysign(), copysignf(), and
copysignl() functions appeared in
4.3BSD, FreeBSD 2.0, and
FreeBSD 5.3, respectively.
| January 26, 2005 | FreeBSD 13.1-RELEASE |
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