HP-UX Reference (11i v1 05/09) - 3 Library Functions A-M (vol 6)

cbrt(3M) cbrt(3M)

NAME

cbrt(), cbrtf() - cube root functions

SYNOPSIS

#include <math.h>

double cbrt(double x);

float cbrtf(float x);

DESCRIPTION

cbrt() returns the cube root of x.

The ISO/ANSI C committee has approved the

cbrt() function for inclusion in the C9X draft standard.

cbrtf() is a float version of cbrt()

; it takes a float argument and returns a float result.

cbrtf() is not speciﬁed by any standard, but it is named in accordance with the conventions speciﬁed in

the "Future Library Directions" section of the ANSI C standard.

To use these functions, compile either with the default -Ae option or with the -Aa

and

-D_HPUX_SOURCE options. Make sure your program includes <

math.h>. Link in the math library by

specifying

-lm on the compiler or linker command line.

RETURN VALUE

If x is ±INFINITY, cbrt() returns ±INFINITY.

If x is NaN,

cbrt() returns NaN.

ERRORS

No errors are deﬁned.