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COPYSIGN(3)              BSD Library Functions Manual              COPYSIGN(3)

NAME
     copysign -- changes the sign of x to that of y

SYNOPSIS
     #include <math.h>

     double
     copysign(double x, double y);

     long double
     copysignl(long double x, long double y);

     float
     copysignf(float x, float y);

DESCRIPTION
     The copysign() functions return x with its sign changed to y's.

SPECIAL VALUES
     copysign(x, y) returns a NaN (with y's sign) if x is a NaN.

STANDARDS
     The copysign() functions conform to ISO/IEC 9899:1999(E).

BSD                              July 2, 2003                              BSD