Let‘s explore Go‘s built-in support for complex numbers via the complex64 and complex128 types. For cube roots, Newton‘s method amounts to repeating:
Find the cube root of 2, just to make sure the algorithm works. There is a Pow function in the math/cmplx package.
package main import "fmt" func Cbrt(x complex128) complex128 { z := complex128(1) for i := 1;i < 10;i++{ z = z - (z*z*z -x)/(3*z*z) } return z } func main() { fmt.Println(Cbrt(8)) }
A Tour of Go Advanced Exercise: Complex cube roots
原文：http://www.cnblogs.com/ghgyj/p/4055707.html