COPYSIGN(3) | FreeBSD Library Functions Manual | COPYSIGN(3) |
NAME
copysign, copysignf, copysignl — copy signLIBRARY
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.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.January 26, 2005 | FreeBSD |