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kei-s/answer_exercise_gotour_48.go

Created September 25, 2014 10:48
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answer_exercise_gotour_48.go
package main
import "fmt"
import "math/cmplx"
func Cbrt(x complex128) complex128 {
z := 1 + 0i
for {
zz := z - ((z * z * z - x) / (3 * z * z))
if cmplx.Abs(z-zz) < 0.0000001 {
return z
}
z = zz
}
return z
}
func main() {
fmt.Println(Cbrt(2))
fmt.Println(cmplx.Pow(Cbrt(2), 3))
}
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