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Chapter 15: Problem 21

Fill-in-the-Blank When both a base class and a derived class have destructors, the base class’s constructor is called __________ (first/last).

Short Answer

Expert verified
Question: When both a base class and a derived class have destructors, the base class's constructor is called ______. Answer: first

Step by step solution

01

Understanding Constructors and Destructors in Inheritance

In object-oriented programming, constructors and destructors play a crucial role in initializing and deallocating memory for objects. When dealing with inheritance, the order of constructor and destructor calls is important to ensure proper initialization and deallocation for both base and derived classes.
02

Constructor Call Order

When an object of a derived class is created, the constructors are called in the following order: 1. Base class constructor(s) 2. Derived class constructor(s) The base class constructor is called before the derived class constructor, ensuring that the base class is properly initialized before the derived class.
03

Destructor Call Order

When an object of a derived class is destroyed, the destructors are called in the following order: 1. Derived class destructor(s) 2. Base class destructor(s) The derived class destructor is called first, ensuring proper deallocation of derived class resources before deallocating the base class resources.
04

Answer to the Fill-in-the-Blank

Given the explanation of constructors and destructors order, the base class's constructor is called "first" when both a base class and a derived class have destructors. So the correct answer is "first".

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Most popular questions from this chapter

What is an abstract base class?

Protected members of a base class are like __________ members, except they may be accessed by derived classes.

Suppose a class named Tiger is derived from both the Felis class and the Carnivore class. Here is the first line of the Tiger class declaration: class Tiger : public Felis, public Carnivore Here is the function header for the Tiger constructor: Tiger(int x, int y) : Carnivore(x), Felis(y) Which base class constructor is called first, Carnivore or Felis?

True or False Private members of a private base class become inaccessible to the derived class.

Can a derived class ever directly access the private members of its base class?
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