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Chapter 15: Problem 8

Suppose Child is a class derived from the class Parent, and the class Grandchild is a class derived from the class Child. This question is concerned with the constructors and destructors for the three classes Parent, Child, and Grandchild. When a constructor for the class Grandchild is invoked, what constructors are invoked and in what order? When the destructor for the class Grandchild is invoked, what destructors are invoked and in what order?

Short Answer

Expert verified
Answer: When a Grandchild object is created, constructors are invoked in this order: Parent, Child, and then Grandchild. When a Grandchild object is destroyed, destructors are invoked in this order: Grandchild, Child, and then Parent.

Step by step solution

01

Understanding the Inheritance Hierarchy

In this problem, we are given that Child is a class derived from Parent, and Grandchild is a class derived from Child. So, the inheritance hierarchy is as follows: Parent -> Child -> Grandchild.
02

Constructor Invocation Order

When an object of the Grandchild class is created, the constructors are invoked in the following order: 1. Parent class constructor 2. Child class constructor 3. Grandchild class constructor The constructor invocation begins with the base class (Parent) and moves down the inheritance hierarchy towards the most derived class (Grandchild).
03

Destructor Invocation Order

When an object of the Grandchild class gets destroyed, the destructors are invoked in the following order: 1. Grandchild class destructor 2. Child class destructor 3. Parent class destructor The destructor invocation begins with the most derived class (Grandchild) and moves up the inheritance hierarchy towards the base class (Parent).

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