Write a declaration for a class named Display. The class...

Name: Problem 74, Chapter 17: Starting out with C++: From Control Structures through Objects
Uploaded: 2021-05-26T12:28:40-08:00
Duration: 5 min 29 s
Channel: Willis James
Description: Write a declaration for a class named Display. The class should be written in such a way that it can be used to create a function object. A function object created from the class should accept an int argument, and display that argument on the screen.

Write a declaration for a class named Display. The class should be written in such a way that it can be used to create a function object. A function object created from the class should accept an int argument, and display that argument on the screen.

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Key Concepts

Stream I/O

Stream input/output in C++ is commonly handled using streams such as std::cout for output. To display an argument on the screen, the class's function call operator would typically use std::cout to print the integer. Understanding how stream I/O works is crucial for implementing display functionality in a function object.

Operator Overloading

Operator overloading in C++ is the process of giving additional meaning to an operator when it is applied to user-defined types. In the provided problem, overloading operator() enables the object of the class to be called like a regular function, taking an integer argument and performing an operation (in this case, displaying that argument on the screen).

Function Object

A function object, also known as a functor, is an instance of a class that overloads the function call operator (operator()). This allows the object to be used as if it were a function. It encapsulates both data and behavior, often making it more flexible than a plain function pointer.

Class Declaration

A class declaration in C++ specifies the properties and behaviors of objects by defining data members and member functions. In this context, it involves declaring a class with a specific name and providing the structure that allows the creation of objects that interact with the program using the defined interface.

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