I am not working yet, just studying and recently dealing with SOLID principles. I have read quite a lot about open closed principle but unfortunately most of the books and articles share the same examples. I do not understand the following: if the class should not be changed after it has been “closed”, how should I change e.g. algorithms for calculations?
I do understand it when it comes to new features / extensions, which is done by subclassing. But it does not address the issue if the base class implementation needs to change (for example a method that is implemented at the base class level). Why this principle does not address that?
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