Book Image

Modern C++: Efficient and Scalable Application Development

By : Richard Grimes, Marius Bancila
Book Image

Modern C++: Efficient and Scalable Application Development

By: Richard Grimes, Marius Bancila

Overview of this book

C++ is one of the most widely used programming languages. It is fast, flexible, and used to solve many programming problems. This Learning Path gives you an in-depth and hands-on experience of working with C++, using the latest recipes and understanding most recent developments. You will explore C++ programming constructs by learning about language structures, functions, and classes, which will help you identify the execution flow through code. You will also understand the importance of the C++ standard library as well as memory allocation for writing better and faster programs. Modern C++: Efficient and Scalable Application Development deals with the challenges faced with advanced C++ programming. You will work through advanced topics such as multithreading, networking, concurrency, lambda expressions, and many more recipes. By the end of this Learning Path, you will have all the skills to become a master C++ programmer. This Learning Path includes content from the following Packt products: • Beginning C++ Programming by Richard Grimes • Modern C++ Programming Cookbook by Marius Bancila • The Modern C++ Challenge by Marius Bancila
Table of Contents (24 chapters)
Title Page
Copyright
About Packt
Contributors
Preface
12
Math Problems
13
Language Features
14
Strings and Regular Expressions
15
Streams and Filesystems
16
Date and Time
17
Algorithms and Data Structures
Index

Solutions


Here are the solutions for the above problem-solving sections.

15. IPv4 data type

The problem requires writing a class to represent an IPv4 address. This is a 32-bit value, usually represented in decimal dotted format, such as 168.192.0.100; each part of it is an 8-bit value, ranging from 0 to 255. For easy representation and handling, we can use four unsigned char to store the address value. Such a value could be constructed either from four unsigned char or from an unsigned long. In order to be able to read a value directly from the console (or any other input stream) and be able to write the value to the console (or any other output stream), we have to overload operator>> and operator<<. The following listing shows a minimal implementation that can meet the requested functionality:

class ipv4
{
   std::array<unsigned char, 4> data;
public:
   constexpr ipv4() : data{ {0} } {}
   constexpr ipv4(unsigned char const a, unsigned char const b, 
                  unsigned...