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Language/Type: C++ recursion
Author: Marty Stepp (on 2016/06/16)

Write a recursive function named starString that accepts an integer parameter n and returns a string of stars (asterisks) 2n long (i.e., 2 to the nth power). For example:

Call Returns Reason
starString(0); "*" 20 = 1
starString(1); "**" 21 = 2
starString(2); "****" 22 = 4
starString(3); "********" 23 = 8
starString(4); "****************" 24 = 16

You should throw an integer exception if passed a value less than 0.

Type your C++ solution code here:

This is a function problem. Write a C++ function as described. Do not write a complete program; just the function(s) above.

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