const int SIMULATION_DURATION = 60 * 12; // one shift
public void processPatients()
{
IQueue <Patient> waitingRoom = null;
bool usePriority = false;//orig false
// create an array or list of ERTables
ERTable[] tables = new ERTable[NUM_TABLES];
// TODO -- populate the array with tables
for (int i = 0; i < NUM_TABLES; i++)/////////////colin
{
tables[i] = new ERTable();
}
// this for loop will run twice, once with a SimpleQueue and once with the PriorityQueue
for (int i = 0; i < 2; i++)
{
Console.WriteLine("\nUsing Priority Queue: {0}", usePriority);
int totalExpired = 0;
int totalPatients = 0;
int maxWait = 0;
int tmpMaxWait = 0;
int totalWait = 0;
int totalStay = 0;
int maxWaitingInLine = 0;
int tmpWaitingInLine = 0;
bool stillWorking = false;
// TODO -- create triage unit
TriageUnit triageUnit = new TriageUnit();
Queue <Patient> frontDoor = triageUnit.getNewPatients();
// TODO set the waitingQueue to one or the other type Queue, depending on the value of usePriority
// you will need to instantiate the appropriate Queue in the if/else statement.
if (usePriority == true)
{
waitingRoom = new PriorityQueue <Patient>();
while (frontDoor.Count > 0)
{
Patient p = frontDoor.Dequeue();
waitingRoom.Add(p.LastPossibleMoment, p);
}
}
else if (usePriority == false)
{
waitingRoom = new SimpleQueue <Patient>();
while (frontDoor.Count > 0)
{
Patient p = frontDoor.Dequeue();
waitingRoom.Add(p.LastPossibleMoment, p);
}
}
// Reset Hospital clock
Hospital.CurrentTime = 0;
while (Hospital.CurrentTime < SIMULATION_DURATION || waitingRoom.Count > 0 || stillWorking)
{
// TODO empty tables that are free
// look for table where ETC <= currentTime
// do not look for expired patients; if they made it to an ER table, they lived
for (int j = 0; j < NUM_TABLES; j++)
{
if (tables[j].ETC <= Hospital.CurrentTime)
{
tables[j].Clear();
}
}
// NOTE: do the following *ONLY* if currentTime < simulation duration, otherwise you'll never finish
// TODO: get list of new patients from triage unit
if (Hospital.CurrentTime < SIMULATION_DURATION)
{
// for each patient in the triage queue
// set IntakeTime for each patient to 'currentTime'
// place new patients into waiting room
// when placing in waiting room, priority is the patient's last possible moment
frontDoor = triageUnit.getNewPatients();
foreach (Patient p in frontDoor)
{
p.IntakeTime = Hospital.CurrentTime;
}
while (frontDoor.Count > 0)
{
Patient p = frontDoor.Dequeue();
waitingRoom.Add(p.LastPossibleMoment, p);
}
}
// TODO: check for maximum number in waiting room
if (waitingRoom.Count > 0)
{
tmpWaitingInLine = waitingRoom.Count;
if (tmpWaitingInLine > maxWaitingInLine)
{
maxWaitingInLine = tmpWaitingInLine;
}
}
// TODO: for every EMPTY tables, be careful here
// remove next patient from waiting room
// check for expired patients (count them)
// (if the patient has expired, you'll need to get another one)
// placing living patients on empty ER table
// update any accumulators, maximums, etc.
for (int d = 0; d < NUM_TABLES; d++)
{
if (tables[d].IsFree && waitingRoom.Count > 0)
{
Patient p = waitingRoom.Remove();
//currenttime > intaketime + timetolive
if (Hospital.CurrentTime > p.IntakeTime + p.TimeToLive)
{
//died
totalExpired++;
p = null;
}
else if (Hospital.CurrentTime < p.IntakeTime + p.TimeToLive)
{
tmpMaxWait = Hospital.CurrentTime - p.IntakeTime;
if (tmpMaxWait > maxWait)
{
maxWait = tmpMaxWait;
}
totalWait += Hospital.CurrentTime - p.IntakeTime;
//totalStay =
p.TimeEnteringER = Hospital.CurrentTime;
totalStay += p.TimeEnteringER + p.TimeForProcedure - p.IntakeTime;
tables[d].AddPatient(p);
totalPatients++;
}
}
}
stillWorking = false;
// TODO: Make certain ALL of the tables are free
// if any table is not free, set stillWorking to true
for (int d = 0; d < NUM_TABLES; d++)
{
if (!tables[d].IsFree)
{
stillWorking = true;
}
}
// set add 10 minutes to hospital time
Hospital.CurrentTime += 10;
}
// print parameters (num tables, duration, using priority queue)
// print time, total patients, max waiting, average waiting, expired patients
Console.WriteLine("Total Elapsed Time: {0,7}", Hospital.CurrentTime);
Console.WriteLine("Total patients: {0,7}", totalPatients);
Console.WriteLine("Total Expired: {0,7}", totalExpired);
Console.WriteLine("Longest Wait: {0,7}", maxWait);
Console.WriteLine("Average Wait: {0,7:N2}", (double)totalWait / totalPatients);
Console.WriteLine("Average Stay: {0,7:N2}", (double)totalStay / totalPatients);
Console.WriteLine("Maximum waiting: {0,7:N2}", maxWaitingInLine);
usePriority = true;
} // end for
} // end processPatients