The first useful C++ usage with the fewest lines
USAGE:
By using __cplusplus macro pre-defined in stdintout header, you can check the C++ standard version which your compiler is running on. Each std version is dictated with different long value and can be looked up on the Internet
A few common ones:
(202101L - C++23) (202002L - C++20) (201703L - C++17) (201402L - c++14) (201103L - C++11) (199711L - C++98)
The older ones can be searched on the Internet so I did not bother putting them here. Search "__cplusplus" macro on Internet for more.