本文档规定了C++编程语言实现的要求。第一个这样的需求是它们实现了语言，所以本文档也定义了C++。其他要求 第一个要求的放松出现在本文档的不同地方。 C++是一种基于C编程语言的通用编程语言，如中所述 ISO/IEC 9899:2018 Programming Languages-C（以下简称C标准）。C++提供 许多超出C提供的功能，包括额外的数据类型、类、模板、异常， 命名空间、运算符重载、函数名重载、引用、自由存储管理运算符， 和额外的图书馆设施。

This document specifies requirements for implementations of the C++ programming language. The first such requirement is that they implement the language, so this document also defines C++. Other requirements and relaxations of the first requirement appear at various places within this document. C++ is a general purpose programming language based on the C programming language as described in ISO/IEC 9899:2018 Programming languages — C (hereinafter referred to as the C standard). C++ provides many facilities beyond those provided by C, including additional data types, classes, templates, exceptions, namespaces, operator overloading, function name overloading, references, free store management operators, and additional library facilities.