如何在Go中扎根？

Question

I'm writing a cube root function in Google Go using Newton's method. I want to check the results using math/cmplx.Pow(), but for the life of me, I can't figure out how. How do I do this?

Answer 1

Have you tried myCubicRootOfx = Pow(x, 1.0/3) ?

edited: thanks to Jason McCreary comment:
We cannot use 1/3 as the 2nd parameter to Pow as this is a integer division and hence doesn't produce the expected 1/3 value. By using 1.0/3' or1/3.0` etc. we effectively produce a float with the 0.333333... value.