C++ is a language with a large user base. From the emergence of C++98 to the official finalization of C++11, it has experienced more than ten years of accumulation. C++14/17 is an important supplement and optimization to C++11, and C++20 brings this language into the door of modernization. All the expanded features in these new standards give C++ the language Infused with new vitality. Those C++ programmers who still insist on using traditional C++ (this book refers to C++98 and the previous C...