Understanding Polymorphism and Slicing in C
Polymorphism, a fundamental concept in object-oriented programming, allows objects of different types to be treated as objects of a common type. However, in C , this concept can be accompanied by an unintended phenomenon known as slicing.
The given code snippet demonstrates an example of polymorphism and slicing:
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When executed, this code surprisingly outputs "rawr", "bark", "rawr", and "bark". This is because of slicing. When "badDog" is initialized with a "Dog" object, only the "Animal" part of the "Dog" object is copied to "badDog." Therefore, "badDog" remains an "Animal" and cannot access the "Dog" behavior.
In C , unlike languages such as Java or C# where value-based copying initializes references, value semantics apply. Copying a class object creates a separate copy of the object with its own allocated memory, leading to slicing. To achieve polymorphic behavior, pointers or references should be employed in C instead of directly assigning one type of object to another.
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