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
About Packt
Math Problems
Language Features
Strings and Regular Expressions
Streams and Filesystems
Date and Time
Algorithms and Data Structures

Writing classes

When you use built-in types, the data is directly available to whatever code has access to that data. C++ provides a mechanism (const) to prevent write access, but any code can use const_cast to cast away const-ness. Your data could be complex, such as a pointer to a file mapped into memory with the intention that your code will change a few bytes and then write the file back to disk. Such raw pointers are dangerous because other code with access to the pointer could change part of the buffer that should not be changed. What is needed is a mechanism to encapsulate the data into a type that knows what bytes to change, and only allow that type to access the data. This is the basic idea behind classes.

Reviewing structures

We have already seen one mechanism in C++ to encapsulate data: struct. A structure allows you to declare data members that are built-in types, pointers, or references. When you create a variable from that struct, you are creating an instance of the structure...