A Tour of Go 48 심화 연습: 복소수 세제곱근

package main

import "fmt"
import "math/cmplx"

func Cbrt(x complex128) complex128 {
    z := cmplx.Pow(x, 3)
    for z != Newtons(z, x) {
        z = Newtons(z, x)
    }
    return z
}

func Newtons(z, x complex128) complex128 {
	return z - (z * z * z - x) / (3 * z * z)
}

func main() {
    fmt.Println(Cbrt(2))
}