(Numerical) Given a number, n, and an approximation for its square root, a closer approximation to the actual square root can be obtained by using this formula:
![1685_13b2a392-9654-4dcc-9c66-bd7b6c1b11ab.png](https://secure.tutorsglobe.com/CMSImages/1685_13b2a392-9654-4dcc-9c66-bd7b6c1b11ab.png)
Using this information, write a C++ program that prompts the user for a number and an initial guess at its square root. Using this input data, your program should calculate an approximation to the square root that's accurate to 0.00001.