C++ Standard and Platform

#include <iostream>

#ifdef _WIN32
    // Windows includes
    #include <windows.h>
#else
    // POSIX (Unix, Linux, macOS, etc.) includes
    #include <unistd.h>
    #include <sys/utsname.h>
#endif

int main()
{
#ifdef _WIN32

    // Windows-specific code
    OSVERSIONINFOEX osvi;
    SYSTEM_INFO si;
    BOOL bOsVersionInfoEx;

    ZeroMemory(&si, sizeof(SYSTEM_INFO));
    ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));

    osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
    bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO*)&osvi);

    if (!bOsVersionInfoEx) {
        std::cerr << "Failed to get OS version information." << std::endl;
        return 1;
    }

    GetSystemInfo(&si);

    std::cout << "Current C++ Standard: " << __cplusplus << std::endl;
    std::cout << "Operating system: " << "Windows" << std::endl;
    std::cout << "Major version: " << osvi.dwMajorVersion << std::endl;
    std::cout << "Minor version: " << osvi.dwMinorVersion << std::endl;
    std::cout << "Build number: " << osvi.dwBuildNumber << std::endl;
    std::cout << "Platform: " << osvi.dwPlatformId << std::endl;
    std::cout << "Service pack: "
              << (osvi.szCSDVersion[0] ? osvi.szCSDVersion : "None")
              << std::endl;

    switch (si.wProcessorArchitecture) {
        case PROCESSOR_ARCHITECTURE_AMD64:
            std::cout << "Machine: AMD64" << std::endl;
            break;
        case PROCESSOR_ARCHITECTURE_INTEL:
            std::cout << "Machine: x86" << std::endl;
            break;
        case PROCESSOR_ARCHITECTURE_ARM:
            std::cout << "Machine: ARM" << std::endl;
            break;
        case PROCESSOR_ARCHITECTURE_IA64:
            std::cout << "Machine: IA64" << std::endl;
            break;
        case PROCESSOR_ARCHITECTURE_ARM64:
            std::cout << "Machine: ARM64" << std::endl;
            break;
        default:
            std::cout << "Machine: Unknown architecture" << std::endl;
            break;
    }

#else

    // Unix/POSIX-specific code
    struct utsname unameData;
    if (uname(&unameData) != 0) {
        std::cerr << "Failed to get system information." << std::endl;
        return 1;
    }

    std::cout << "Current C++ Standard: " << __cplusplus << std::endl;
    std::cout << "Operating system: " << unameData.sysname << std::endl;
    std::cout << "Node name: " << unameData.nodename << std::endl;
    std::cout << "Release: " << unameData.release << std::endl;
    std::cout << "Version: " << unameData.version << std::endl;
    std::cout << "Machine: " << unameData.machine << std::endl;

#endif

    return 0;
}