请使用C++写出进程调度的相关代码

基于您提供的文档中的实验任务2，我将为您编写一个简单的C++程序来实现进程调度。此示例将采用简单轮转（Round Robin, RR）调度算法，并且会考虑时间片的概念。为了简化，我们假设所有的进程都已经准备好，并且在一个数组中列出。每个进程具有ID、优先级、到达时间和CPU片段列表等属性。

### C++ 代码实现

#include <iostream>
#include <vector>
#include <queue>

struct Process {
    int id;
    int priority;
    int arrivalTime;
    std::vector<int> cpuBursts; // CPU burst durations
    int remainingTime = 0; // Remaining total CPU time for the process
};

class Scheduler {
public:
    void addProcess(const Process& p) {
        processes.push_back(p);
        remainingProcesses.push(&processes.back());
    }

    void schedule(int quantum) {
        while (!remainingProcesses.empty()) {
            Process* current = remainingProcesses.front();
            if (current->arrivalTime <= currentTime) {
                runProcess(current, quantum);
                if (current->remainingTime == 0) {
                    completedProcesses.push_back(*current);
                    remainingProcesses.pop();
                }
            } else {
                currentTime = current->arrivalTime;
            }
        }
    }

    void printResults() const {
        double avgWaitTime = 0.0, avgTurnaroundTime = 0.0;
        for (const auto& p : completedProcesses) {
            std::cout << "Process ID: " << p.id 
                      << ", Turnaround Time: " << (currentTime - p.arrivalTime)
                      << ", Waiting Time: " << (currentTime - p.arrivalTime - p.remainingTime) << "\n";
            avgWaitTime += currentTime - p.arrivalTime - p.remainingTime;
            avgTurnaroundTime += currentTime - p.arrivalTime;
        }
        avgWaitTime /= completedProcesses.size();
        avgTurnaroundTime /= completedProcesses.size();
        std::cout << "Average Waiting Time: " << avgWaitTime << "\n";
        std::cout << "Average Turnaround Time: " << avgTurnaroundTime << "\n";
    }

private:
    std::vector<Process> processes;
    std::queue<Process*> remainingProcesses;
    std::vector<Process> completedProcesses;
    int currentTime = 0;

    void runProcess(Process* p, int quantum) {
        int execTime = std::min(quantum, p->remainingTime);
        p->remainingTime -= execTime;
        currentTime += execTime;
    }
};

int main() {
    Scheduler scheduler;
    int numProcesses;
    std::cin >> numProcesses;

    for (int i = 0; i < numProcesses; ++i) {
        int id, priority, arrivalTime, burstsCount;
        std::cin >> id >> priority >> arrivalTime >> burstsCount;
        Process p{ id, priority, arrivalTime };
        for (int j = 0; j < burstsCount; ++j) {
            int burst;
            std::cin >> burst;
            p.cpuBursts.push_back(burst);
            p.remainingTime += burst;
        }
        scheduler.addProcess(p);
    }

    int quantum;
    std::cin >> quantum;
    scheduler.schedule(quantum);
    scheduler.printResults();

    return 0;
}

### 说明
1. **Process 结构体**：定义了进程的基本属性。
2. **Scheduler 类**：实现了进程的添加、调度和结果打印。
3. **main 函数**：从标准输入读取进程信息和时间片大小，创建 `Scheduler` 对象并调用 `schedule` 方法执行调度，最后输出结果。

这个程序可以作为一个基础框架，您可以根据需要进一步扩展和完善。例如，可以增加对IO片段的支持，或者尝试不同的调度策略。