Abstract
Polymorphism is such a powerful feature of object-oriented programming that you’ll use it in the majority of your C++ programs. Polymorphism requires you to use derived classes, so the content of this chapter relies heavily on the concepts related to inheritance in derived classes that we introduced in the previous chapter.
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Notes
- 1.
Some compilers don’t enable runtime type identification by default, so if this doesn’t work, look for a compiler option to switch it on.
- 2.
With some popular compilers, we kid you not, you may even notice that typeid() evaluates its operand twice. In our example, that means that the line GetSomeBox() called... might appear twice in the output. This is a bug, of course. But still it’s all the more reason never to apply typeid() to a function call.
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© 2018 Ivor Horton and Peter Van Weert
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Horton, I., Van Weert, P. (2018). Polymorphism. In: Beginning C++17. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-3366-5_14
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DOI: https://doi.org/10.1007/978-1-4842-3366-5_14
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Publisher Name: Apress, Berkeley, CA
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Online ISBN: 978-1-4842-3366-5
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