"Elementary" Examples.

1. simpleDate0/ Version 0: struct Date.
2. simpleDate1/ Version 1: class Date.
3. simpleDate2/ Version 2: overloaded operator; const member function.
4. simpleDate3/ Version 3: member operator.
5. simpleDate4/ Version 4: constructors and validators

6. Simple Fractions (struct-based)
7. Simple Fractions (class-based)

8. simpleSet version 1: fixed-length arrays

"Advanced" Examples.

1. Essential member functions and how they are implicitly called.

2. simpleSet version 2: variable-length arrays

3. array members and their lengths/ (enumerated constant members)