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#include <iostream>
#include <iomanip>
#include <fstream>
#include <queue>
using namespace std;
struct Customer
{
int currentTime;
int newDepartureEvent;
int departureTime;
int arrivalTime;
int transactionTime;
int customerID;
};
struct Event
{
int newDepartureEvent;
int departureTime;
int customerID;
int transactionTime;
int arrivalTime;
int currentTime;
//Used to compare events and determine highest priority
bool operator < (const Event& right) const
{
return this->arrivalTime < right.arrivalTime;
}
};
void simulate();
void processArrival(int ¤tTime, Event &newEvent, priority_queue<Event> &eventListPQueue, queue<Customer> &bankQueue, bool tellerAvailable);
void processDeparture(Event &newEvent, priority_queue<Event> &eventListPQueue, queue<Customer> &bankQueue, bool tellerAvailable);
int main()
{
simulate();
return 0;
}
void simulate()
{
//Used to read in file
ifstream File;
//Declaring local variables
int data;
int arrivalEvent = 0;
int transactionTime = 0;
bool tellerAvailable = 0;
//Creating an empty queue called bankQueue to represent a bank line
//Creating an empty priority queue called eventListPQueue for an event list
queue <Customer> bankQueue;
priority_queue <Event> eventListPQueue;
//Creating and adding arrival events to event list
File.open("in1.txt");
//Data file is not empty
while(File)
{
//Getting next arriavl time and transaction time from file
File >> arrivalEvent >> transactionTime;
//cout << "test data: " << data << endl;
cout << "test newArrivalEvent: " << arrivalEvent << endl;
cout << "test transactionTime: " << transactionTime << endl;
// a new arrival event containing a and t
Event event;
event.arrivalTime = arrivalEvent;
event.transactionTime = transactionTime;
eventListPQueue.push(event);
}
//Closing File
File.close();
//An Event loop
int currentTime = 0;
// Event loop
while (!eventListPQueue.empty()) { // Event list is not empty
Event newEvent;
newEvent = eventListPQueue.top();
currentTime = newEvent.arrivalTime; // Get current time
if (newEvent.arrivalTime && newEvent.departureTime == 0) { // is an arrival event
processArrival(currentTime, newEvent, eventListPQueue, bankQueue, tellerAvailable);
}
else
processDeparture(newEvent, eventListPQueue, bankQueue, tellerAvailable);
}
/*
//Event list is not empty
while (eventListPQueue.size() > 0 )
{
Event newEvent;
newEvent = eventListPQueue.top();
//Get current time
currentTime = newEvent.arrivalTime;
// is an arrival event
if (newEvent.arrivalTime)
processArrival(newEvent, eventListPQueue, bankQueue);
else
processDeparture(newEvent, eventListPQueue, bankQueue);
*/
//**************** pseudiocode to fill in **************************************
//// Processes an arrival event.
//processArrival(arrivalEvent: Event, eventListPQueue : PriorityQueue, bankQueue : Queue)
//// Remove this event from the event list
//eventListPQueue.remove()
//
//customer = customer referenced in arrivalEvent
//if (bankQueue.isEmpty() && tellerAvailable) {
// departureTime = currentTime + transaction time in arrivalEvent
// newDepartureEvent = a new departure event with departureTime
// eventListPQueue.add(newDepartureEvent)
// tellerAvailable = false
//}
//else
// bankQueue.enqueue(customer)
//
// // Processes a departure event .
// +processDeparture(departureEvent: Event, eventListPQueue: PriorityQueue, bankQueue: Queue)
// // Remove this event from the event list
// eventListPQueue.remove()
//
// if (!bankQueue.isEmpty()) {
//
// // Customer at front of line begins transaction
// customer = bankQueue.peek()
// bankQueue.dequeue()
// departureTime = currentTime + transaction time in customer
// newDepartureEvent = a new departure event with departureTime
// eventListPQueue.add(newDepartureEvent)
// }
// else
// tellerAvailable = true
}
void processArrival(int ¤tTime, Event &newEvent, priority_queue<Event> &eventListPQueue, queue<Customer> &bankQueue, bool tellerAvailable)
{
Event grab;
Event event;
Event eventCustomer;
Customer customerIn_line;
eventListPQueue.pop(); // Remove this event from the event list
event.customerID++; // customer = customer referenced in arrivalEvent
if (bankQueue.empty() && tellerAvailable) {
grab.departureTime = currentTime + newEvent.transactionTime; // departureTime = currentTime + transaction time in arrivalEvent
grab.newDepartureEvent = grab.departureTime; // newDepartureEvent = a new departure event with departureTime
eventListPQueue.push(grab); // eventListPQueue.add(newDepartureEvent)
tellerAvailable = false; // tellerAvailable = false
}
else {
customerIn_line.arrivalTime = event.arrivalTime;
customerIn_line.transactionTime = event.transactionTime;
bankQueue.push(customerIn_line); // bankQueue.enqueue(customer)
}
}
//Where problem occurs
void processDeparture(Event &newEvent, priority_queue<Event> &eventListPQueue, queue<Customer> &bankQueue, bool tellerAvailable)
{
eventListPQueue.pop();
Customer customer;
if(!bankQueue.empty())
{
customer = bankQueue.front();
bankQueue.pop();
customer.departureTime = customer.currentTime + customer.transactionTime;
customer.newDepartureEvent = customer.departureTime;
eventListPQueue.push(customer.newDepartureEvent);
}
else
{
tellerAvailable = true;
}
}
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