Sams Teach Yourself C++ in 21 Days

strcpy(fullname,firstname);

offset = strlen(firstname);

strcpy(fullname+offset,” “);

offset += 1;

strcpy(fullname+offset,middlename);

offset += strlen(middlename);

strcpy(fullname+offset,”. “);

offset += 2;

strcpy(fullname+offset,lastname);

cout << firstname << “-” << middlename << “-”

<< lastname << endl;

cout << “Fullname: “ << fullname << endl;

return 0;

}

4. The array is five elements by four elements, but the code initializes 4×5.


5. You wanted to write i<5, but you wrote i<=5instead. The code will run when i ==
   5 and j == 4, but there is no such element as SomeArray[5][4].

Day 14

Quiz

1. A down cast (also called “casting down”) is a declaration that a pointer to a base
   class is to be treated as a pointer to a derived class.


2. This refers to the idea of moving shared functionality upward into a common base
   class. If more than one class shares a function, it is desirable to find a common
   base class in which that function can be stored.


3. If neither class inherits using the keyword virtual,two Shapesare created, one
   for Rectangleand one for Shape. If the keyword virtualis used for both classes,
   only one shared Shapeis created.


4. Both Horseand Birdinitialize their base class,Animal, in their constructors.
   Pegasusdoes as well, and when a Pegasusis created, the Horseand Birdinitial-
   izations of Animalare ignored.


5. The following is one possible answer:
   class Vehicle
   {
   virtual void Move() = 0;
   }


6. None must be overridden unless you want to make the class nonabstract, in which
   case all three must be overridden.

848 Appendix D

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