用c语言代码测试电脑硬盘性能

在C语言中，可以使用Windows API函数来测试硬盘性能。

下面是一个简单的示例程序，可以测试硬盘的读写速度：

#include <windows.h>
#include <stdio.h>

int main()
{
    char szFilePath[MAX_PATH] = {"test_file.bin"};
    char szBuffer[1024 * 1024] = {0};
    DWORD dwBytesWritten = 0;
    DWORD dwBytesRead = 0;
    LARGE_INTEGER liFileSize = {0};
    LARGE_INTEGER liStart = {0};
    LARGE_INTEGER liEnd = {0};
    HANDLE hFile = NULL;

    // 创建测试文件
    hFile = CreateFile(szFilePath, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        printf("文件创建失败！\n");
        return -1;
    }

    memset(szBuffer, 'A', sizeof(szBuffer));
    if (!WriteFile(hFile, szBuffer, sizeof(szBuffer), &dwBytesWritten, NULL))
    {
        printf("文件写入失败！\n");
        CloseHandle(hFile);
        return -1;
    }

    CloseHandle(hFile);

    // 获取文件大小
    hFile = CreateFile(szFilePath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        printf("文件打开失败！\n");
        return -1;
    }

    GetFileSizeEx(hFile, &liFileSize);

    CloseHandle(hFile);

    // 顺序读取文件
    hFile = CreateFile(szFilePath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        printf("文件打开失败！\n");
        return -1;
    }

    QueryPerformanceCounter(&liStart);

    while (ReadFile(hFile, szBuffer, sizeof(szBuffer), &dwBytesRead, NULL) && dwBytesRead != 0)
    {
        // 读取文件内容
    }

    QueryPerformanceCounter(&liEnd);

    CloseHandle(hFile);

    // 输出顺序读取速度
    printf("顺序读取速度：%lf MB/s\n", (double)liFileSize.QuadPart / 1024 / 1024 / ((double)(liEnd.QuadPart - liStart.QuadPart) / (double)liFileSize.QuadPart));

    // 随机读取文件
    hFile = CreateFile(szFilePath, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (hFile == INVALID_HANDLE_VALUE)
    {
        printf("文件打开失败！\n");
        return -1;
    }

    QueryPerformanceCounter(&liStart);

    for (int i = 0; i < 1000; i++)
    {
        LARGE_INTEGER liOffset = {0};
        liOffset.QuadPart = ((double)rand() / RAND_MAX) * liFileSize.QuadPart;

        SetFilePointerEx(hFile, liOffset, NULL, FILE_BEGIN);

        ReadFile(hFile, szBuffer, sizeof(szBuffer), &dwBytesRead, NULL);
    }

    QueryPerformanceCounter(&liEnd);

    CloseHandle(hFile);

    // 输出随机读取速度
    printf("随机读取速度：%lf MB/s\n", (double)1000 * sizeof(szBuffer) / 1024 / 1024 / ((double)(liEnd.QuadPart - liStart.QuadPart) / (double)liFileSize.QuadPart));

    // 删除测试文件
    DeleteFile(szFilePath);

    return 0;
}

注意：该程序只能测试本地硬盘的性能，不能测试网络硬盘的性能。另外，需要管理员权限才能运行。

希望能帮到您！