Before Object Oriented Programming ... hopefully this has helped illustrate how you might actually use objects and classes in practice. ... For example, one object can be derived from another.

Object-oriented programming allows procedures about objects to be created whose exact type is not known until runtime. For example, a screen cursor may change its shape from an arrow to a line ...

For example, RTOSes have threads, semaphores, mutexes, and other objects organized as classes in C, although often without an explicit coding convention, such as the one presented here. This idea of ...