Composite Types in C
This is an example of composition in C.
typedef struct { int age; char *name; enum { male, female } sex; } Person;In this example, the primitive types int, char *, and enum {male, female} are combined to form the composite type of Person. Each object of type Person then "has an" age, name, and sex.
If a Person type were instead created by subtyping, it might be a subtype of Organism, and it could inherit some attributes from Organism (every organism has an age), while extending the definition of Organism with new attributes (not every organism has a gender, but every person does).
Read more about this topic: Object Composition
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