9 11 14这些是对应的编译器的版本号，也就是cl.exe打出来的版本号。

C:\Program Files (x86)\Microsoft Visual Studio\2019\Professional>cl
Microsoft (R) C/C++ Optimizing Compiler Version 19.29.30133 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

C++版本号，自己搜搜就有：

The C++ programming language was initially standardized in 1998 as ISO/IEC 14882:1998, which was then amended by the C++03, C++11, C++14, and C++17 standards. The current C++20 standard supersedes these with new features and an enlarged standard library.
Since 2012, C++ has been on a three-year release schedule[14] with C++23 as the next planned standard.
--
FROM 114.240.244.*