What type of class do I need for this?

I want to create a class that is usable without being instanced, but that can also be instanced. Similar to a math class I suppose.

T开发者_运维问答hanks

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If you add static methods to the class, you can call them like this

 ClassName::staticMethod();

You are not stopped from also creating instances of this class.

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A regular class with a constructor with static class functions.