VC++读取CPU温度的代码

VC++中可以使用WMI（Windows Management Instrumentation）来读取CPU温度。下面是一个示例代码：

#include <iostream>
#include <comdef.h>
#include <Wbemidl.h>

#pragma comment(lib, "wbemuuid.lib")

using namespace std;

int main()
{
    HRESULT hres;

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

    // 设置COM安全性级别
    hres = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT,
                                RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
    if (FAILED(hres))
    {
        cout << "Failed to initialize security. Error code = 0x" << hex << hres << endl;
        CoUninitialize();
        return 1;
    }

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

    IWbemServices *pSvc = NULL;
    hres = pLoc->ConnectServer(_bstr_t(L"ROOT\\WMI"), NULL, NULL, 0, NULL, 0, 0, &pSvc);
    if (FAILED(hres))
    {
        cout << "Could not connect to WMI service. Error code = 0x" << hex << hres << endl;
        pLoc->Release();
        CoUninitialize();
        return 1;
    }

    // 设置WMI服务安全性级别
    hres = CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL,
                             RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE);
    if (FAILED(hres))
    {
        cout << "Could not set proxy blanket. Error code = 0x" << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;
    }

    // 执行WMI查询语句
    IEnumWbemClassObject *pEnumerator = NULL;
    hres = pSvc->ExecQuery(bstr_t("WQL"), bstr_t("SELECT * FROM MSAcpi_ThermalZoneTemperature"), WBEM_FLAG_FORWARD_ONLY, NULL, &pEnumerator);
    if (FAILED(hres))
    {
        cout << "Failed to execute query. Error code = 0x" << hex << hres << endl;
        pSvc->Release();
        pLoc->Release();
        CoUninitialize();
        return 1;
    }

    // 遍历查询结果
    IWbemClassObject *pclsObj = NULL;
    ULONG uReturn = 0;
    while (pEnumerator)
    {
        hres = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
        if (0 == uReturn)
        {
            break;
        }

        VARIANT vtProp;
        hres = pclsObj->Get(L"CurrentTemperature", 0, &vtProp, 0, 0);
        if (FAILED(hres))
        {
            cout << "Failed to get CurrentTemperature property. Error code = 0x" << hex << hres << endl;
        }
        else
        {
            wcout << "CPU temperature: " << vtProp.lVal / 10.0f << " ℃" << endl;
        }

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

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

    return 0;
}

上述代码使用WMI查询语句"SELECT * FROM MSAcpi_ThermalZoneTemperature"来获取CPU温度。需要注意的是，该查询语句只适用于支持ACPI的计算机，并且需要管理员权限才能执行。