Importance of Data Structure
Encapsulation
The principle of hiding the used data structure and to
only provide a well-defined interface is known as
encapsulation.
Example: define an ADT for complex numbers
Subtraction
Division
How represent data?
Version A: Both parts are stored in a two-valued record. If
the element name of the real part is Re and that of the
imaginary part is Im, x and y can be obtained with: x=c.Re
and y=c.Im.