Overridable functions are declared using keyword override virtual concrete

Overridable functions are typically declared using the keyword "virtual." When a function is marked as virtual in a base class, it allows derived classes to provide their own implementation of the function. This feature is crucial in object-oriented programming as it supports polymorphism, enabling a program to decide at runtime which method to invoke based on the object type rather than the reference type. If you want to avoid confusion with overriding methods, ensure that the base class methods are declared as virtual. A common mistake is to forget to mark them as virtual, leading to only the base class version being called, which can cause bugs and unexpected behavior in your program. Debugging this can be tricky, so always double-check your function declarations!