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

Using objects with pointers


Objects can be created on the free store and accessed through a typed pointer. This gives more flexibility because it is efficient to pass pointers to functions, and you can explicitly determine the lifetime of the object because an object is created with the call to new and destroyed by the call to delete.

Getting pointers to object members

If you need to get access to the address of a class data member through an instance (assuming the data member is public), you simply use the & operator:

    struct point { double x; double y; }; 
    point p { 10.0, 10.0 }; 
    int *pp = &p.x;

In this case struct is used to declare point so that the members are public by default. The second line uses an initialization list to construct a point object with two values, and then the final line gets a pointer to one of the data members. Of course, the pointer cannot be used after the object has been destroyed. Data members are allocated in memory (in this case on the stack...