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Chapter 15: Problem 3
A class with at least one pure virtual member function is called a(n) _________ class.
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The ability of code to execute differently depending on the type of data is called _________.
A collection of abstract classes defining an application in skeletal form is called a(n) _________.
Suppose that the classes Dog and cat derive from Animal, which in turn derives from Creature. Suppose further that pDog, pCat, pAnimal, and pCreature are pointers to the respective classes. Suppose that Animal and creature are both abstract classes. Rewrite the following two statements to get them to compile correctly. \\[ \begin{array}{l} \text { pAnimal = new Dog; } \\ \text { pDog = pAnimal; } \end{array} \\]
The has-a relation between classes is best implemented using the mechanism of class _________.
A base class pointer needs a(n) _________ to be assigned to a derived class pointer.
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