*** 作系统进程控制实验报告代码

#include
#include
#include 
#include 
using namespace std;
int n;
int method;

class random         //取随机数
{
public:
	static inline int getRandom(const int min, const int max, int match)
	{
		srand(time(0) + match);
		return rand() % (max - min - 1) + min;
	}
};
class PCB
{
	int id;
	int time;
	string state;
	int round_time;
	int priority;
public:
	int get_priority()
	{
		return priority;
	}
	int get_time()
	{
		return time;
	}
	int get_id()
	{
		return id;
	}
	int get_round_time()
	{
		return round_time;
	}
	string get_state()
	{
		return this->state;
	}
	void set_id(int n)
	{
		this->id = n;
	}
	void set_round_time(int n)
	{
		this->round_time = n;
	}
	void set_priority(int n)
	{
		this->priority = n;
	}
	void set_time(int random)
	{
		this->time = random;
	}
	void set_state(string random)
	{
		this->state = random;
	}
};
bool operator > (PCB p1, PCB p2) {
	return p1.get_priority() > p2.get_priority();
}

bool operator < (PCB p1, PCB p2) {
	return p1.get_priority() < p2.get_priority();
}
void show(priority_queue<PCB, vector<PCB>, less<PCB> >ready_queue, queue<PCB>running,queue<PCB>finish)
{
	queue<PCB>ready;
	while(!ready_queue.empty())
	{
		ready.push(ready_queue.top());
		ready_queue.pop();
	}
	cout << "就绪队列为：";
	while (!ready.empty())
	{
		cout << ready.front().get_id() << " ";
		ready.pop();
	}
	cout << endl;
	cout << "运行队列为：";
	while (!running.empty())
	{
		cout << running.front().get_id() << " ";
		running.pop();
	}
	cout << endl;
	cout << "完成队列为：";
	while (!finish.empty())
	{
		cout << finish.front().get_id() << " ";
		finish.pop();
	}
	cout << endl;
}
void show(queue<PCB>ready, queue<PCB>running, queue<PCB>finish)
{
	cout << "就绪队列为：";
	while (!ready.empty())
	{
		cout << ready.front().get_id() << " ";
		ready.pop();
	}
	cout << endl;
	cout << "运行队列为：";
	while (!running.empty())
	{
		cout  << running.front().get_id() << " ";
		running.pop();
	}
	cout << endl;
	cout << "完成队列为：";
	while (!finish.empty())
	{
		cout  << finish.front().get_id() << " ";
		finish.pop();
	}
	cout << endl;
}
int main()
{
	cout << "请输入进程数目" << endl;
	cin >> n;
	cout << endl;
	cout << "请选择调度方法(1为优先权法，2为轮转法)" << endl;
	cin >> method;
	cout << endl;
	if (method == 1)
	{
		priority_queue<PCB, vector<PCB>, less<PCB> >ready_queue;
		queue<PCB>running;
		queue<PCB>finish;
		for (int i = 1; i <= n; ++i)
		{
			PCB pcb;
			pcb.set_id(i);
			pcb.set_state("Ready");
			pcb.set_time(random::getRandom(1, 20, i));
			pcb.set_priority(random::getRandom(70, 120, i));
			cout << "初始化进程 " << pcb.get_id() << '\t'
				<< " 状态为： " << pcb.get_state()
				<< "   所需时间片数为：  " << pcb.get_time()
				<< "   优先权为： " << pcb.get_priority() << endl;
			ready_queue.push(pcb);
		}
		while (!ready_queue.empty())
		{
			PCB temp = ready_queue.top();
			running.push(temp);
			ready_queue.pop();
			show(ready_queue, running, finish);
			temp.set_priority(temp.get_priority() - 3);
			temp.set_time(temp.get_time() - 1);
			if (temp.get_time() == 0)
			{
				finish.push(temp);
				running.pop();
				show(ready_queue, running, finish);
			}
			else
			{
				running.pop();
				ready_queue.push(temp);
			}
		}
	}
	else
	{
		queue<PCB>ready;
		queue<PCB>running;
		queue<PCB>finish;
		for (int i = 0; i < n; i++)
		{
			PCB pcb;
			pcb.set_id(i+1);
			pcb.set_time(random::getRandom(10, 20, i));
			pcb.set_round_time(random::getRandom(1, 5, i));
			cout << "初始化进程 " << pcb.get_id() << '\t'
				<< " 状态为： " << pcb.get_state()
				<< "   所需时间片数为：  " << pcb.get_time()
				<< "   轮转时间片为： " << pcb.get_round_time() << endl;
			ready.push(pcb);
		}
		while (!ready.empty())
		{
			PCB temp = ready.front();
			ready.pop();
			int temp_round_time = temp.get_round_time();
			if (temp_round_time >= temp.get_time())
			{
				finish.push(temp);
				show(ready, running, finish);
				continue;
			}
			else
			{
				running.push(temp);
				temp.set_time(temp.get_time() - temp_round_time);
				ready.push(temp);
				running.pop();
				show(ready, running, finish);

			}
		}
	}
	return 0;
}