Can Abstract Classes Be Stored in C Vectors?

The Enigma of Abstract Class Vectors in C

In C#, abstract classes can double as interfaces, enabling the creation of vectors that store instances of child classes. However, this approach is met with resistance in C . Let's delve into the reasons and explore potential solutions.

The Essence of the Problem

C prohibits the instantiation of abstract classes. Abstract classes define pure virtual functions that must be implemented in derived classes. Therefore, a vector of abstract classes becomes infeasible since there are no objects to instantiate.

The Workaround: Exceptional Abstract Classes

One proposed workaround is to modify the abstract class by implementing the pure virtual functions as exceptions. While this technique technically allows for vector instantiation, it is considered poor practice. Exceptions should primarily handle run-time errors, not serve as default implementations.

A Superior Solution: Vector of Abstract Class Pointers

A more elegant solution lies in utilizing a vector of pointers to abstract classes. This approach preserves both the essence of abstraction and enables polymorphic behavior. By storing pointers, you can access objects of child classes and harness their unique implementations without violating abstraction principles.

Conclusion

Although abstract classes have their merits, they cannot be directly instantiated within vectors in C . The solution of using pointers to abstract classes provides a flexible and effective alternative, allowing for dynamic handling of objects from multiple derived classes.

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