ruby--ruby/missing/cbrt.c

#include "ruby/missing.h"
#include <math.h>

double cbrt(double x)
{
    if (x < 0)
        return -pow(-x, 1/3.0);
    else
        return pow(x, 1/3.0);
}
* missing/*.c: include missing.h git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28771 b2dd03c8-39d4-4d8f-98ff-823fe69b080e 2010-07-28 04:12:01 -04:00			`#include "ruby/missing.h"`
* math.c (math_cbrt): new method Math.cbrt. * configure.in (cbrt): check for replacement functions. * missing/cbrt.c: new file. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@15416 b2dd03c8-39d4-4d8f-98ff-823fe69b080e 2008-02-09 04:36:03 -05:00			`#include <math.h>`

			`double cbrt(double x)`
			`{`
			`if (x < 0)`
			`return -pow(-x, 1/3.0);`
			`else`
			`return pow(x, 1/3.0);`
			`}`