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
The copysign(), copysignf() and copysignl() functions return x with its sign changed to y's.
SEE ALSO
STANDARDS
The copysign(), copysignf(), and copysignl() routines conform to ISO/IEC 9899:1999 (“ISO C99”). They implement the Copysign function recommended by IEEE Std 754-1985.
HISTORY
The copysign(), copysignf(), and copysignl() functions appeared in 4.3BSD, FreeBSD 2.0, and FreeBSD 5.3, respectively.