用C++写一个进程管理系统

好的，进程管理系统可以包含以下功能：

1. 创建进程
2. 终止进程
3. 列出所有进程
4. 显示进程信息
5. 暂停进程
6. 恢复进程

以下是一个简单的C++代码示例：

#include <iostream>
#include <Windows.h>
#include <TlHelp32.h>

using namespace std;

void listProcesses() {
    HANDLE hProcessSnap;
    PROCESSENTRY32 pe32;

    hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
    if (hProcessSnap == INVALID_HANDLE_VALUE) {
        cout << "Error: Unable to create process snapshot" << endl;
        return;
    }

    pe32.dwSize = sizeof(PROCESSENTRY32);

    if (!Process32First(hProcessSnap, &pe32)) {
        CloseHandle(hProcessSnap);
        cout << "Error: Unable to get first process" << endl;
        return;
    }

    cout << "Processes:" << endl;
    do {
        cout << "  " << pe32.th32ProcessID << " " << pe32.szExeFile << endl;
    } while (Process32Next(hProcessSnap, &pe32));

    CloseHandle(hProcessSnap);
}

void showProcessInfo(DWORD pid) {
    HANDLE hProcess;
    PROCESS_MEMORY_COUNTERS pmc;

    hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pid);
    if (hProcess == NULL) {
        cout << "Error: Unable to open process" << endl;
        return;
    }

    if (GetProcessMemoryInfo(hProcess, &pmc, sizeof(pmc))) {
        cout << "Process ID: " << pid << endl;
        cout << "Working Set Size: " << pmc.WorkingSetSize << endl;
        cout << "Pagefile Usage: " << pmc.PagefileUsage << endl;
        cout << "Peak Working Set Size: " << pmc.PeakWorkingSetSize << endl;
        cout << "Peak Pagefile Usage: " << pmc.PeakPagefileUsage << endl;
    } else {
        cout << "Error: Unable to get process memory info" << endl;
    }

    CloseHandle(hProcess);
}

void createProcess(string cmd) {
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));

    if (!CreateProcess(NULL, const_cast<char*>(cmd.c_str()), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi)) {
        cout << "Error: Unable to create process" << endl;
        return;
    }

    cout << "Process created with ID: " << pi.dwProcessId << endl;

    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);
}

void terminateProcess(DWORD pid) {
    HANDLE hProcess;

    hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
    if (hProcess == NULL) {
        cout << "Error: Unable to open process" << endl;
        return;
    }

    if (!TerminateProcess(hProcess, 0)) {
        cout << "Error: Unable to terminate process" << endl;
    } else {
        cout << "Process terminated" << endl;
    }

    CloseHandle(hProcess);
}

void suspendProcess(DWORD pid) {
    HANDLE hProcess;

    hProcess = OpenProcess(PROCESS_SUSPEND_RESUME, FALSE, pid);
    if (hProcess == NULL) {
        cout << "Error: Unable to open process" << endl;
        return;
    }

    if (SuspendThread(hProcess) == (DWORD)-1) {
        cout << "Error: Unable to suspend process" << endl;
    } else {
        cout << "Process suspended" << endl;
    }

    CloseHandle(hProcess);
}

void resumeProcess(DWORD pid) {
    HANDLE hProcess;

    hProcess = OpenProcess(PROCESS_SUSPEND_RESUME, FALSE, pid);
    if (hProcess == NULL) {
        cout << "Error: Unable to open process" << endl;
        return;
    }

    if (ResumeThread(hProcess) == (DWORD)-1) {
        cout << "Error: Unable to resume process" << endl;
    } else {
        cout << "Process resumed" << endl;
    }

    CloseHandle(hProcess);
}

int main() {
    int choice;
    DWORD pid;
    string cmd;

    while (true) {
        cout << "1. List processes" << endl;
        cout << "2. Show process info" << endl;
        cout << "3. Create process" << endl;
        cout << "4. Terminate process" << endl;
        cout << "5. Suspend process" << endl;
        cout << "6. Resume process" << endl;
        cout << "0. Exit" << endl;
        cout << "Enter choice: ";
        cin >> choice;

        switch (choice) {
            case 1:
                listProcesses();
                break;
            case 2:
                cout << "Enter process ID: ";
                cin >> pid;
                showProcessInfo(pid);
                break;
            case 3:
                cout << "Enter command: ";
                cin.ignore();
                getline(cin, cmd);
                createProcess(cmd);
                break;
            case 4:
                cout << "Enter process ID: ";
                cin >> pid;
                terminateProcess(pid);
                break;
            case 5:
                cout << "Enter process ID: ";
                cin >> pid;
                suspendProcess(pid);
                break;
            case 6:
                cout << "Enter process ID: ";
                cin >> pid;
                resumeProcess(pid);
                break;
            case 0:
                return 0;
            default:
                cout << "Invalid choice" << endl;
                break;
        }

        cout << endl;
    }

    return 0;
}

该代码使用了Windows API函数来实现各种进程管理功能。您可以根据需要进行修改和扩展。