Chapter 11 // Exercise 6 - Principles & Practice Using C++

In this exercise I am using Visual Studio Community 2017 and the header file "std_lib_facilities.h" which can be found here:

http://www.stroustrup.com/Programming/PPP2code/std_lib_facilities.h

Chapter 11 // Exercise 6

 Write a program that replaces punctuation with whitespace. Consider .(dot),
 ; (semicolon), ,(comma), ? (question mark), - (dash), ' (single quote)
 punctuation characters. Don't modify characters within a pair of double
 quotes ("). For example "-don't use the as-if rule." becomes " don t use the
 as if rule ".

GitHub: https://github.com/l-paz91/principles-practice/blob/master/Chapter%2011/Exercise%206

I'm sure there's a more elegant way to do this than if's and counting quotes but it isn't too ugly to I'll allow it.