In mathematics, the Fibonacci numbers are the series of number that exhibit the following pattern:

0,1,1,2,3,5,8,13,21,34,55,89,144,....

In mathematical notation the sequence Fn of Fibonacci number is defined by the following recurrence relation:

Fn=Fn-1+Fn-2

With the initial values of F0=0 and F1=1. Thus, the next number in the series is the sum of the previous two numbers. Write a program that asks the user for a positive integer N and generate the Nth Fibonacci number. Your main function should handle user input and pass that data to a function called Fib that takes n integer value N as input and a reference parameter that is assigned the Nth Fibonacci number.