Create a C++ program that implements the following function:

unsigned int hex2Dec(const string& hexString)

See the following article which describes an algorithm for how to convert from hexadecimal to decimal:

http://www.binaryhexconverter.com/hex-to-decimal-converter (Links to an external site.)Links to an external site.

The function should throw an invalid_argument exception if the string is not composed of hexadecimal characters.

From main, test the function by allowing the user to pass strings to the function inside a loop. Make sure to handle any exceptions that occur!