C语言实现监控windows的cpu的top10进程

要实现C语言监控Windows的CPU的Top 10进程，可以考虑以下步骤：

1. 使用Windows API的函数获取当前进程列表，包括每个进程的PID和CPU占用率等信息。

2. 将获取到的每个进程的CPU占用率进行排序，找出占用率最高的Top 10进程。

3. 将Top 10进程的PID和CPU占用率等信息记录下来，可以输出到控制台、日志文件或者发送到其他应用程序进行处理。

下面是一个简单的C语言代码示例，可以实现监控Windows的CPU的Top 10进程：

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

#define MAX_PROCESSES 1024

typedef struct {
    DWORD pid;
    float cpu_usage;
} PROCESS_INFO;

int compare_process_info(const void *a, const void *b) {
    const PROCESS_INFO *pa = (const PROCESS_INFO *)a;
    const PROCESS_INFO *pb = (const PROCESS_INFO *)b;
    if (pa->cpu_usage > pb->cpu_usage) {
        return -1;
    } else if (pa->cpu_usage < pb->cpu_usage) {
        return 1;
    } else {
        return 0;
    }
}

int main() {
    PROCESS_INFO processes[MAX_PROCESSES];
    DWORD num_processes = 0;
    float cpu_total = 0.0f;

    while (1) {
        // 获取进程列表
        DWORD cbNeeded;
        DWORD processIds[MAX_PROCESSES];
        if (!EnumProcesses(processIds, sizeof(processIds), &cbNeeded)) {
            printf("Error: EnumProcesses failed!\n");
            break;
        }
        num_processes = cbNeeded / sizeof(DWORD);

        // 计算每个进程的CPU占用率
        cpu_total = 0.0f;
        for (DWORD i = 0; i < num_processes; ++i) {
            HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, processIds[i]);
            if (hProcess) {
                FILETIME dummy, creationTime, exitTime, kernelTime, userTime;
                if (GetProcessTimes(hProcess, &dummy, &dummy, &kernelTime, &userTime) &&
                    GetSystemTimeAsFileTime(&dummy) &&
                    GetProcessTimes(hProcess, &creationTime, &exitTime, &dummy, &dummy)) {
                    ULARGE_INTEGER kernelTimeLarge, userTimeLarge;
                    kernelTimeLarge.LowPart = kernelTime.dwLowDateTime;
                    kernelTimeLarge.HighPart = kernelTime.dwHighDateTime;
                    userTimeLarge.LowPart = userTime.dwLowDateTime;
                    userTimeLarge.HighPart = userTime.dwHighDateTime;
                    float cpu_usage = (kernelTimeLarge.QuadPart + userTimeLarge.QuadPart) / (10000.0f * GetTickCount());
                    processes[i].pid = processIds[i];
                    processes[i].cpu_usage = cpu_usage;
                    cpu_total += cpu_usage;
                }
                CloseHandle(hProcess);
            }
        }

        // 排序并输出Top 10进程
        qsort(processes, num_processes, sizeof(PROCESS_INFO), compare_process_info);
        printf("Top 10 processes:\n");
        for (DWORD i = 0; i < 10 && i < num_processes; ++i) {
            if (processes[i].cpu_usage > 0.0f) {
                printf("PID: %d, CPU usage: %.2f%%\n", processes[i].pid, processes[i].cpu_usage * 100);
            }
        }
        printf("Total CPU usage: %.2f%%\n", cpu_total * 100);
        Sleep(1000);
    }

    return 0;
}

该代码使用了`EnumProcesses`和`GetProcessTimes`等Windows API函数，可以获取进程列表和每个进程的CPU占用率等信息，然后使用`qsort`函数对进程列表进行排序，输出Top 10进程和总CPU占用率。该代码可以作为一个Windows服务运行，不断监控系统中的进程情况，并输出Top 10进程的信息。