Importance of Data Structure
Encapsulation |
Version A: |
z.Re = x.Re + y.Re |
z.Im = x.Im + y.Im
Version B: |
z[0] = x[0] + y[0]
z[1] = x[1] + y[1]
For example the addition of two complex numbers |
requires you to perform an addition for each part. |
Consequently, you must access the value of each part |
which is different for each version. By providing an |
operation “add'' you can encapsulate these details from
its actual use. In an application context you simply “add |
two complex numbers'' regardless of how this |
functionality is actually achieved. |