int main () {
DoubleLinkList A;
int customerCounter = 1;
int minNumber = 1;
int totalSimulationTime = 0, maxIntervalEnterQueue = 0, maxIntervalServePerson = 0, timeUntilNextCustomer = 0;
bool validInput = false;
string trash;
// Gather user input information. Prompt again if invalid input, i.e. non-numeric.
while(!validInput) {
cout << "Enter the length of time simulation should run (minutes): ";
cin >> totalSimulationTime;
if (!cin.eof() && cin.good())
validInput = true;
else {
cout << "Invalid input. Please try again." << endl;
cin.clear();
cin >> trash; //remove the bad input from the cin stream by throwing it into the trash string
}
}
validInput = false;
while(!validInput) {
cout << "Enter maximum interval between individual people entering the queue (minutes): ";
cin >> maxIntervalEnterQueue;
if (!cin.eof() && cin.good())
validInput = true;
else {
cout << "Invalid input. Please try again." << endl;
cin.clear();
cin >> trash; //remove the bad input from the cin stream by throwing it into the trash string
}
}
validInput = false;
while(!validInput) {
cout << "Enter maximum interval of time to serve an individual person in the queue (minutes): ";
cin >> maxIntervalServePerson;
if (!cin.eof() && cin.good())
validInput = true;
else {
cout << "Invalid input. Please try again." << endl;
cin.clear();
cin >> trash; //remove the bad input from the cin stream by throwing it into the trash string
}
}
cout << endl;
maxIntervalEnterQueue--; // account for rand() mod
maxIntervalServePerson--; // account for rand() mod
timeUntilNextCustomer = 1+rand()%(maxIntervalEnterQueue); // initialize time until next customer
A.putCustomer(customerCounter, 1, maxIntervalServePerson); // initialize first customer
cout << "Minute # | Customer # | Entry Minute | Service Time Remaining | Wait Time remaining | Minutes remaining until Service is finished" << endl;
for(; minNumber<=totalSimulationTime; minNumber++) {
if (A.getFirstCustomer() != NULL) { // check if any customers in line
if (A.getFirstCustomer()->getTimeToServe() == 0)
A.dequeue();
if (A.getFirstCustomer() != NULL) // check if any customers in line
A.getFirstCustomer()->decrementTimeToServe();
}
if (timeUntilNextCustomer == 0) { // new customer! add to queue and reset timer
timeUntilNextCustomer = 1 + rand()%(maxIntervalEnterQueue);
A.putCustomer(++customerCounter, minNumber, maxIntervalServePerson);
}
A.getListReverse(minNumber); // print out customers in line and relevant information
timeUntilNextCustomer--;
}
return 0;
}
