COPYSIGN(3)         Linux Programmer's Manual         COPYSIGN(3)

NAME
       copysign - copy sign of a number

SYNOPSIS
       #include <math.h>

       double copysign(double x, double y);

DESCRIPTION
       The  copysign()  function  returns  a value whose absolute
       value matches x, but whose sign matches that of y.

CONFORMING TO
       BSD 4.3

GNU                        June 6, 1993                         1