Find Square and cubic root of a number

Given a number n, find the cube root of n.
Examples:

Input:  n = 3
Output: Cubic Root is 1.442250

Input: n = 8
Output: Cubic Root is 2.000000
http://www.geeksforgeeks.org/find-cubic-root-of-a-number/

Square root of an integer:
http://www.geeksforgeeks.org/square-root-of-an-integer/