c++ 获取cpu温度

获取 CPU 温度需要调用操作系统提供的 API，因此在不同的操作系统上实现方式可能不同。以下是在 Windows 系统下使用 WMI 获取 CPU 温度的示例代码：

#include <iostream>
#include <comdef.h>
#include <Wbemidl.h>
#pragma comment(lib, "wbemuuid.lib")

int main()
{
    HRESULT hres;

    // 初始化 COM 库
    hres = CoInitializeEx(0, COINIT_MULTITHREADED);
    if (FAILED(hres))
    {
        std::cerr << "Failed to initialize COM library. Error code: " << hres << std::endl;
        return 1;
    }

    // 设置安全级别
    hres = CoInitializeSecurity(
        NULL,
        -1, // 使用当前登录用户进行身份验证
        NULL,
        NULL,
        RPC_C_AUTHN_LEVEL_DEFAULT,
        RPC_C_IMP_LEVEL_IMPERSONATE,
        NULL,
        EOAC_NONE,
        NULL
    );
    if (FAILED(hres))
    {
        std::cerr << "Failed to initialize security. Error code: " << hres << std::endl;
        CoUninitialize();
        return 1;
    }

    // 获取 WMI 服务
    IWbemLocator* pLoc = NULL;
    hres = CoCreateInstance(
        CLSID_WbemLocator,
        0,
        CLSCTX_INPROC_SERVER,
        IID_IWbemLocator,
        (LPVOID*)&pLoc
    );
    if (FAILED(hres))
    {
        std::cerr << "Failed to create IWbemLocator object. Error code: " << hres << std::endl;
        CoUninitialize();
        return 1;
    }

    IWbemServices* pSvc = NULL;
    hres = pLoc->ConnectServer(
        _bstr_t(L"ROOT\\WMI"), // WMI 名称空间
        NULL,
        NULL,
        0,
        NULL,
        0,
        0,
        &pSvc
    );
    if (FAILED(hres))
    {
        std::cerr << "Failed to connect to WMI. Error code: " << hres << std::endl;
        pLoc->Release();
        CoUninitialize();
        return 1;
    }

    // 设置 WMI 查询语句
    const wchar_t* wql = L"SELECT * FROM MSAcpi_ThermalZoneTemperature";
    IEnumWbemClassObject* pEnumerator = NULL;
    hres = pSvc->ExecQuery(
        _bstr_t(L"WQL"),
        _bstr_t(wql),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY,
        NULL,
        &pEnumerator
    );
    if (FAILED(hres))
    {
        std::cerr << "Failed to execute WQL query. Error code: " << hres << std::endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;
    }

    // 获取查询结果
    IWbemClassObject* pObj = NULL;
    ULONG uReturned = 0;
    while (pEnumerator)
    {
        hres = pEnumerator->Next(WBEM_INFINITE, 1, &pObj, &uReturned);
        if (uReturned == 0)
        {
            break;
        }

        VARIANT vtProp;
        hres = pObj->Get(L"CurrentTemperature", 0, &vtProp, 0, 0);
        if (SUCCEEDED(hres))
        {
            // 将温度从 K 转换成摄氏度
            double temp = vtProp.dblVal - 273.15;
            std::cout << "CPU temperature: " << temp << " C" << std::endl;
        }

        VariantClear(&vtProp);
        pObj->Release();
    }

    // 释放资源
    pEnumerator->Release();
    pSvc->Release();
    pLoc->Release();
    CoUninitialize();

    return 0;
}

需要注意的是，该示例代码仅适用于 Windows 系统，并且需要使用管理员权限运行。在 Linux 系统下获取 CPU 温度的方法也不同，可以使用 Linux 操作系统提供的 sysfs 接口或者 lm_sensors 库等。