To get the most out of this book

Basic C++ experience, including a familiarity with memory management, object-oriented programming, and basic data structures and algorithms, will be a big plus. If you have a yearning to learn how this complex program works under the hood, as well as a desire to understand the details of the programming concepts and best practices of C++ application design, then you should definitely proceed further with this book.

Software/hardware covered in the book	OS requirements
g++ compiler	Ubuntu Linux is a plus, but not a requirement

You will also need the Qt framework to be installed on your computer. Details are covered in the relevant chapter.

At the time of writing this book, not all C++ compilers were supporting all the new C++20 features, consider using the latest version of your compiler in order to test out more features introduced in the chapter.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packt.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Expert-CPP. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://static.packt-cdn.com/downloads/9781838552657_ColorImages.pdf

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The preceding code declares two readonly properties with preassigned values."

A block of code is set as follows:

Range book = 1..4;
var res = Books[book] ;
Console.WriteLine($"\tElement of array using Range: Books[{book}] => {Books[book]}");

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

private static readonly int num1=5;
private static readonly int num2=6;

Any command-line input or output is written as follows:

dotnet --info

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."

Warnings or important notes appear like this.

Tips and tricks appear like this.