- Old
 - predicate.cpp outputs are greeting, demonstrates the use of a predicate
 Mikhail Nesterenko
 9/26/2013
 - stackExample.cpp demonstrates program stack, needs to be traced
 Mikhail Nesterenko
 2/13/2013
 - swapem.cpp demonstrates call-by-reference parameters.
 Walt Savitch
 10/3/00
 - valVSref.cpp illustrates difference between call-by-value and by-reference 
 Walter Savitch
 10/3/00