DIFFERENCES WITH 

	    Problem Solving With C++ by Walter J. Savitch, Pearson, 2017, Tenth
	    Edition, ISBN: 978-0134448282

* compulsive return 0;

  in Savitch every function, including main() has return 0; statement
  this is old style. Not used often


* using namespace std;

  this imports all names from the standard namespace. This style is sloppy
  and is frowned upon. We explicitly import needed names:

  using std::cin; using std::cout; 


* function opening curly bracket is on a separate line, same
  for brancing/looping

  Savitch uses this style:

  if(i > 0) 
  {
    // body of the loop
  }


  we use this style:

  if(i > 0){
    // body of the loop
  }


* const capitalization: states 
  	const int MY_CONST = 55;

  this is old style. Now constants are capitalized the same way as variables
       const int myConst = 55;


* says "increment by one": increment already means "add one" so "increment by
  one" is redundant


* output stream formatting: not discussed in class
  Operations like these:

    cout.setf(ios::right);
    cout.width(10);

  are ignored

* compulsive use of suffix increment.
  i++; instead of ++i;

   This is old style, may lead to inefficiencies.