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1.9.3p392(2013-02-22revision39386)
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missing
cbrt.c
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#include "
ruby/missing.h
"
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#include <math.h>
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double
cbrt
(
double
x)
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{
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if
(x < 0)
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return
-pow(-x, 1/3.0);
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else
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return
pow(x, 1/3.0);
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}
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