C++ feels like a new language. That is, I can express my ideas more clearly, more simply, and more directly today than I could in C++98. Furthermore, the resulting programs are better checked by the compiler and run faster.
This book gives an overview of C++ as defined by C++17, the current ISO C++ standard, and implemented by the major C++ suppliers. In addition, it mentions concepts and modules, as defined in ISO Technical Specifications and in current use, but not scheduled for inclusion into the standard until C++20.
Like other modern languages, C++ is large and there are a large number of libraries needed for effective use. This thin book aims to give an experienced programmer an idea of what constitutes modern C++. It covers most major language features and the major standard-library components. This book can be read in just a few hours but, obviously, there is much more to writing good C++ than can be learned in a day. Howev er, the aim here is not mastery, but to give an overview, to giv e key examples, and to help a programmer get started.
The assumption is that you have programmed before. If not, please consider reading a textbook, such as Programming: Principles and Practice Using C++ (Second edition) [Stroustrup,2014], before continuing here. Even if you have programmed before, the language you used or the applications you wrote may be very different from the style of C++ presented here.
Think of a sightseeing tour of a city, such as Copenhagen or New York. In just a few hours, you are given a quick peek at the major attractions, told a few background stories, and given some suggestions about what to do next. You do not know the city after such a tour. You do not understand all you have seen and heard. You do not know how to navigate the formal and informal rules that govern life in the city. To really know a city, you have to liv e in it, often for years. However, with a bit of luck, you will have gained a bit of an overview, a notion of what is special about the city, and ideas of what might be of interest to you. After the tour, the real exploration can begin.
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