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Chapter 7: Problem 23

A constructor whose parameters all have default values is a(n) _________ constructor.

Short Answer

Expert verified
Answer: A 'Default Constructor' has default values for all of its parameters. The purpose of a default constructor is to create objects of a class with default values assigned to its member variables, allowing for the creation and initialization of a class instance without the need for the caller to provide specific values for the parameters.

Step by step solution

01

Define a Constructor with Default Parameters

A constructor whose parameters all have default values is called a 'Default Constructor'. A default constructor is a constructor that can be called without passing any arguments, and all parameters have default values assigned to them.
02

Explain the Purpose of Default Constructors

Default constructors are used to create objects of a class with default values assigned to its member variables. It allows for the creation and initialization of a class instance without the need for the caller to provide specific values for the parameters.
03

Provide an Example of a Default Constructor in a Programming Language

Here's an example of a default constructor in C++: ``` class Rectangle { public: Rectangle(int length = 1, int width = 1) : m_length(length), m_width(width) { } private: int m_length; int m_width; }; ``` In this example, the constructor of the class 'Rectangle' has default values for its parameters 'length' and 'width'. When an object of this class is created without providing arguments, the default constructor is called, and the default values are used to initialize the member variables.

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Most popular questions from this chapter

A class may have more than one constructor, as long as each has a different _________.

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