Call pure virtual function from parent class?

Run() is an instance member. Parent::init is a static (class-level) member. So in your init() implementation, there is no instance (of Parent or Child) available on which to call run().

You're trying to call an instance method from a static method. You'll need to change init() to be an instance method (by removing the static keyword) or else you'll need to call the run() method using an object, e.g. Obj->run() or obj.run().

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