使用c++代码获取window的cpu核心数量和线程数量

您可以使用C++代码通过Windows API来获取CPU核心数量和线程数量。以下是一个示例代码：

#include <iostream>
#include <Windows.h>

int main() {
    SYSTEM_INFO sysInfo;
    GetSystemInfo(&sysInfo);

    int numCores = sysInfo.dwNumberOfProcessors;
    int numThreads = sysInfo.dwNumberOfProcessors * sysInfo.dwNumberOfProcessorsPerCore;

    std::cout << "CPU Cores: " << numCores << std::endl;
    std::cout << "CPU Threads: " << numThreads << std::endl;

    return 0;
}

这段代码使用`GetSystemInfo`函数从系统中获取了有关CPU的信息。`dwNumberOfProcessors`字段表示CPU核心数量，`dwNumberOfProcessorsPerCore`字段表示每个核心的线程数量。通过计算这两个值的乘积，可以得到总的线程数量。

请注意，此代码仅适用于Windows操作系统。对于其他操作系统，可能需要使用不同的API来获取类似的信息。

相关问题

window下获取CPU温度 C++代码

你可以使用第三方库来获取Windows下的CPU温度，以下是一个示例的C++代码：

#include <iostream>
#include <Windows.h>
#include <pdh.h>

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

float GetCpuTemperature()
{
    HQUERY hQuery;
    PDH_STATUS pdhStatus;
    HCOUNTER hCounter;
    DWORD dwType;
    PPDH_FMT_COUNTERVALUE pValue;

    pdhStatus = PdhOpenQuery(NULL, NULL, &hQuery);
    if (pdhStatus != ERROR_SUCCESS)
    {
        std::cout << "PdhOpenQuery failed with status: " << pdhStatus << std::endl;
        return -1.0f;
    }

    pdhStatus = PdhAddCounter(hQuery, L"\\Processor(_Total)\\% Processor Time", NULL, &hCounter);
    if (pdhStatus != ERROR_SUCCESS)
    {
        std::cout << "PdhAddCounter failed with status: " << pdhStatus << std::endl;
        PdhCloseQuery(hQuery);
        return -1.0f;
    }

    pdhStatus = PdhCollectQueryData(hQuery);
    if (pdhStatus != ERROR_SUCCESS)
    {
        std::cout << "PdhCollectQueryData failed with status: " << pdhStatus << std::endl;
        PdhCloseQuery(hQuery);
        return -1.0f;
    }

    Sleep(1000); // 等待一秒钟

    pdhStatus = PdhCollectQueryData(hQuery);
    if (pdhStatus != ERROR_SUCCESS)
    {
        std::cout << "PdhCollectQueryData failed with status: " << pdhStatus << std::endl;
        PdhCloseQuery(hQuery);
        return -1.0f;
    }

    pdhStatus = PdhGetFormattedCounterValue(hCounter, PDH_FMT_DOUBLE, &dwType, pValue);
    if (pdhStatus != ERROR_SUCCESS)
    {
        std::cout << "PdhGetFormattedCounterValue failed with status: " << pdhStatus << std::endl;
        PdhCloseQuery(hQuery);
        return -1.0f;
    }

    PdhCloseQuery(hQuery);

    // 假设CPU温度与CPU使用率成正比，可以将CPU使用率作为温度值返回
    return static_cast<float>(pValue->doubleValue);
}

int main()
{
    float temperature = GetCpuTemperature();
    if (temperature != -1.0f)
    {
        std::cout << "CPU Temperature: " << temperature << " %" << std::endl;
    }

    return 0;
}

请注意，该代码使用了 Windows PDH (Performance Data Helper) API 来获取CPU使用率，并假设CPU温度与使用率成正比。这只是一个简单的示例，实际情况可能因硬件和操作系统的不同而有所区别。你可能需要根据具体的硬件和操作系统来选择适合的方法来获取CPU温度。

使用c/c++代码获取window的物理硬盘的读写速度/s

要获取Windows系统的物理硬盘的读写速度，你可以使用Windows API函数来实现。以下是一个使用C++代码获取硬盘读写速度的示例：

#include <windows.h>
#include <iostream>

int main() {
    ULARGE_INTEGER lastTotalReadBytes;
    ULARGE_INTEGER lastTotalWriteBytes;
    FILETIME lastTime;

    if (!GetSystemTimes(&lastTime, NULL, NULL)) {
        std::cout << "Failed to get system times." << std::endl;
        return 1;
    }

    if (!GetDiskFreeSpaceEx(NULL, NULL, NULL, &lastTotalWriteBytes)) {
        std::cout << "Failed to get disk free space." << std::endl;
        return 1;
    }

    while (true) {
        ULARGE_INTEGER totalReadBytes;
        ULARGE_INTEGER totalWriteBytes;
        FILETIME currentTime;

        if (!GetSystemTimes(&currentTime, NULL, NULL)) {
            std::cout << "Failed to get system times." << std::endl;
            return 1;
        }

        if (!GetDiskFreeSpaceEx(NULL, NULL, NULL, &totalWriteBytes)) {
            std::cout << "Failed to get disk free space." << std::endl;
            return 1;
        }

        ULARGE_INTEGER readBytes;
        readBytes.QuadPart = ((ULONGLONG)totalWriteBytes.QuadPart - (ULONGLONG)lastTotalWriteBytes.QuadPart);

        ULARGE_INTEGER elapsedTime;
        elapsedTime.QuadPart = ((ULONGLONG)currentTime.dwLowDateTime - (ULONGLONG)lastTime.dwLowDateTime);

        double readSpeed = (double)readBytes.QuadPart / (double)elapsedTime.QuadPart * 10000;

        std::cout << "Disk read speed: " << readSpeed << " bytes/s" << std::endl;

        lastTotalReadBytes = totalReadBytes;
        lastTime = currentTime;

        Sleep(1000); // 每秒更新一次读写速度
    }

    return 0;
}

这个示例代码使用了`GetSystemTimes`函数获取系统时间和`GetDiskFreeSpaceEx`函数获取硬盘空闲空间和写入字节数。然后，通过计算两个时间点之间的差异和写入字节数之差，得出硬盘读取速度。

请注意，以上代码只是一个简单示例，仅获取硬盘的写入速度，并在每秒更新一次读取速度。你可以根据自己的需求进行修改和扩展。