example_4.cpp   Add missing parens, fix else if loop on ln 28
example_4.cpp   Add additional info in debugging lines.
example_4.cpp   Modify control loops, more work needed.

-When a number too large is entered, the program will reprompt only once, rather than until correct input is entered.
-When a number too small is entered, the program will reprompt only once, rather than until correct input is entered.
example_4.cpp   Change (if) to (while) in line 29, fix for control loop
example_4.cpp   Improve error loops

Known issues: When a letter is entered, it will clear it and reprompt for only numbers, but if a number is then entered nothing happens.