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C++ user group is a fairly large. From the advent of C++98 to the official finalization of C++11, it has accumulated over a decade. C++14/17 is an important complement and optimization for C++11, and C++20 brings this language to the door of modernization. The extended features of all these new standards are given to the C++ language. Infused with new vitality.

C++ programmers, who are still using**traditional C++** (this book refers to C++98 and its previous C++ standards as traditional C++), may even amzed by the fact that they are not using the same language while reading C++11/14/17/20 code.

C++ programmers, who are still using**traditional C++** (this book refers to C++98 and its previous C++ standards as traditional C++), may even amzed by the fact that they are not using the same language while readingmodernC++ code.

**Modern C++** (this book refers to C++11/14/17/20) introduces a lot of features into traditional C++, which makes the whole C++ become language that modernized. Modern C++ not only enhances the usability of the C++ language itself, but the modification of the`auto` keyword semantics gives us more confidence in manipulating extremely complex template types. At the same time, a lot of enhancements have been made to the language runtime. The emergence of Lambda expressions has made C++ have the "closure" feature of "anonymous functions", which is almost in modern programming languages ​​(such as Python/Swift/.. It has become commonplace, and the emergence of rvalue references has solved the problem of temporary object efficiency that C++ has long been criticized.

C++ 是一个用户群体相当大的语言。从 C++98 的出现到 C++11 的正式定稿经历了长达十年多之久的积累。C++14/17 则是作为对 C++11 的重要补充和优化，C++20 则将这门语言领进了现代化的大门，所有这些新标准中扩充的特性，给 C++ 这门语言注入了新的活力。

那些还在坚持使用**传统 C++**（本书把 C++98 及其之前的 C++ 特性均称之为传统 C++）而未接触过 C++11/14/17/20 的 C++ 程序员在见到诸如 Lambda 表达式这类全新特性时，甚至会流露出『学的不是同一门语言』的惊叹之情。

那些还在坚持使用**传统 C++**（本书把 C++98 及其之前的 C++ 特性均称之为传统 C++）而未接触过现代 C++ 的 C++ 程序员在见到诸如 Lambda 表达式这类全新特性时，甚至会流露出『学的不是同一门语言』的惊叹之情。

**现代 C++** (本书中均指 C++11/14/17/20) 为传统 C++ 注入的大量特性使得整个 C++ 变得更加像一门现代化的语言。现代 C++ 不仅仅增强了 C++ 语言自身的可用性，`auto` 关键字语义的修改使得我们更加有信心来操控极度复杂的模板类型。同时还对语言运行期进行了大量的强化，Lambda 表达式的出现让 C++ 具有了『匿名函数』的『闭包』特性，而这一特性几乎在现代的编程语言（诸如 Python/Swift/... ）中已经司空见惯，右值引用的出现解决了 C++ 长期以来被人诟病的临时对象效率问题等等。

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{\large Changkun Ou (hi@changkun.us)}

\noindent This work was written by\href{https://github.com/changkun}{Ou Changkun} and licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.\texttt{\small http://creativecommons.org/licenses/by-nc-nd/4.0/}

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<h4>欧长坤 著</h4>

<h1>

高速上手<br>C++11/14/17/20

现代C++教程<br>

</h1>

<h2>第二版</h2>

<h2>高速上手 C++ 11/14/17/20</h2>

<h3>第二版</h3>

<p>

<aclass="button white"href="<%- url_for("/modern-cpp/zh-cn/00-preface/") %>">🇨🇳 在线阅读</a>

<aclass="button download"href="<%- url_for("/modern-cpp/pdf/modern-cpp-tutorial-zh-cn.pdf") %>">🇨🇳 下载</a>

</div><divclass="right">

<h4>Changkun Ou</h4>

<h1>

C++11/14/17/20<br>On the Fly

ModernC++Tutorial

</h1>

<h2>Second Edition</h2>

<h2>C++ 11/14/17/20 On the Fly</h2>

<h3>SECOND EDITION</h3>

<p>

<aclass="button white"href="<%- url_for("/modern-cpp/en-us/00-preface/") %>">🇬🇧 Read Online</a>

<aclass="button download"href="<%- url_for("/modern-cpp/pdf/modern-cpp-tutorial-en-us.pdf") %>">🇬🇧 Download</a>

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