freebsd man page for copysignf

COPYSIGN(3)						   BSD 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
     The copysign(), copysignf() and copysignl() functions return x with its sign changed to y's.

SEE ALSO
     fabs(3), fdim(3), ieee(3), math(3)

STANDARDS
     The copysign(), copysignf(), and copysignl() routines conform to ISO/IEC 9899:1999 (``ISO C99'').	They implement the Copysign function rec-
     ommended by IEEE Std 754-1985.

HISTORY
     The copysign(), copysignf(), and copysignl() functions appeared in 4.3BSD, FreeBSD 2.0, and FreeBSD 5.3, respectively.

BSD
								 January 26, 2005							       BSD