this post was submitted on 02 Jul 2023
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No Stupid Questions (Developer Edition)

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What C++ standard/version am I using? (programming.dev)
submitted 1 year ago by [email protected] to c/[email protected]
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I just started learning c++. I installed visual studio with "Desktop Development with C++". CPlusPlus.com shows info for different c++ versions. How can I check which one I am using?

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[–] [email protected] 2 points 1 year ago

See this for reference.

Here's a snippet:

#if defined(__cplusplus) && __cplusplus >= 201703L
    std::cout << "compiler supports C++17" << std::endl;
#elif defined(__cplusplus) && __cplusplus >= 201402L
    std::cout << "compiler supports C++14" << std::endl;
#elif defined(__cplusplus) && __cplusplus >= 201103L
    std::cout << "compiler supports C++11" << std::endl;
#elif defined(__cplusplus) && __cplusplus >= 199711L
    std::cout << "compiler supports C++98" << std::endl;
#else
    std::cout << "compiler supports C++, standard unknown" << std::endl;
#endif

To specify at compile-time, use g++ -std=c++17 for instance.