也许：learncpp.com 更好，内容都来自这里，我简单的随手记一下

设置安全等级==4，设置警告是报错，设置语言标准为最新 命令行：/w44365

image-20240304221141494

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以下程序应打印编译器当前配置使用的语言标准。您可以运行此程序来验证您的编译器是否使用您期望的语言标准。

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#include <iostream>

const int numStandards = 7;
const long stdCode[numStandards] = { 199711L, 201103L, 201402L, 201703L, 202002L, 202302L, 202612L };
const char* stdName[numStandards] = { "Pre-C++11", "C++11", "C++14", "C++17", "C++20", "C++23", "C++26" };

long getCPPStandard()
{
    // Visual Studio is non-conforming in support for __cplusplus (unless you set a specific compiler flag, which you probably haven't)
    // In Visual Studio 2015 or newer we can use _MSVC_LANG instead
    // See https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/
#if defined (_MSVC_LANG)
    return _MSVC_LANG;
#elif defined (_MSC_VER)
    // If we're using an older version of Visual Studio, bail out
    return 1;
#else
    // __cplusplus is the intended way to query the language standard code (as defined by the language standards)
    return __cplusplus;
#endif
}

int main()
{
    long standard{ getCPPStandard() };

    if (standard == 1)
    {
        std::cout << "Error: Unable to determine your language standard.  Sorry.\n";
        return 0;
    }

    std::cout << "Your compiler is using language standard: ";
    for (int i = 0; i < numStandards; ++i)
    {
        if (standard <= stdCode[i])
        {
            std::cout << stdName[i];
            // If the reported version is between two standard codes, this must be a preview / experimental support
            if (standard < stdCode[i])
                std::cout << " (preview)";
            break;
        }
    }

    std::cout << '\n';

    return 0;
}