Quote: a switch statement that uses run-time type inquires destroys the modularity of a program; it is error-prone and not object-oriented

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It is very seductive to use a run-time … Using run-time type inquiries to implement a switch … object-oriented programming. It is also error-prone [for example, it is easy to forget a case during program maintenance.]   Google-1   Google-2

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Additional Titles

Quote: use virtual function calls rather than run-time type inquiries even though the later may be easier and more efficient

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