A ListStack (class) is a last-in-first-out data structure ( linked list ). Each node contains data and a pointer to the next node. The last node (end of the list) has a pointer pointing to 0.
Simplifying command line option handling by allowing you to add/remove/switch specific variables; please check/run the test file for example(s).
A Rational number class.
A memory efficient method (a set class) of holding a set of (integer) values.
Shared C Strings class.