Where is the benefit in using the Strategy Pattern?

Question

I\'ve looked at this explanation on Wikipedia, specifically the C++ sample, and fail to recognize the difference between just defining 3 classes, creating instances and call

Answer 1

There is a difference between strategy and decision/choice. Most of the time a we would be handling decisions/choices in our code, and realise them using if()/switch() constructs. Strategy pattern is useful when there is a need to decouple the logic/algorithm from usage.

As an example, Think of a polling mechanism, where different users would check for resources/updates. Now we may want some of the priveliged users to be notified with a quicker turnaround time or with more details. Essentailly the logic being used changes based on user roles. Strategy makes sense from a design/architecture view point, at lower levels of granularity it should always be questioned.