simbusstop.java

Java code Bankline to allocated the source for next

/**
 * Title:        SimBusStop.java
 * Description:  A simple Bus Stop simulation using Queue
 */

import miscLib.SimpleInput;

public class SimBusStop {

    public static void main(String[] args) {
//    ListQueue t = new ListQueue();
	ArrayQueue t = new ArrayQueue(50);
    int code, time, count;
    Integer item;
    int totalPeople = 0;
    int totalBus = 0;
    int totalVacantSeat = 0;
    int outstandingWait = 0;
    int people = 0;
    int wait = 0;

		do
		{
			code = SimpleInput.getInteger("Code (0 for people, 1 for bus, -1 to exit): ");
		} while (code < -1 || code > 1);

		int lastTime = 0;

		while (code!=-1)
		{
			do
			{
				time = SimpleInput.getInteger("Arrival time (>="+Integer.toString(lastTime)+"): ");
			} while (lastTime > time);

			lastTime = time;

			do
			{
				count = SimpleInput.getInteger("Arrival count (> 0): ");
			} while (count <= 0);

			// output the triplet (for checking)
			System.out.println(code + "  " + time + "  " + count);

			if (code==0)
			{
				totalPeople += count;
				while (count-- > 0)
					t.enqueue (new Integer(time));
			}
			else
				if (code==1)
				{
					totalBus++;
					while ( (count > 0) && !t.empty ())
					{
						item = (Integer) t.dequeue ();
						wait += time - item.intValue();
						people++;
						count--;
					}
					totalVacantSeat += count;
				}

				do
				{
					code = SimpleInput.getInteger("Code (0 for people, 1 for bus, -1 to exit): ");
				} while (code < -1 || code > 1);
			}

		// check # of people got on a bus
		if (people != 0) {	// some people got on the bus
			System.out.println (people + " people waited for " +
								wait + " minutes, average waiting time = " +
								(float) wait/people + " minutes.");
		}
		else {	// no one got on the bus
			System.out.println ("0 people go on the bus.");
		}

		// check # o buses passed the bus stop
		if (totalBus != 0) {	// some buses did pass the bus stop
			System.out.println ("Number of buses passed the bus stop = " + totalBus);
			System.out.println ("Average number of people got on a bus = " +
								(float) people/totalBus);
			System.out.println ("Average number of vacant seats for a bus = " +
								(float) totalVacantSeat / totalBus );
		}
		else {	// no bus passed the bus stop
			System.out.println("0 bus passed the bus stop.");
		}

		// check # of people still waiting at the bus stop
		System.out.print ("Number of people still waiting = " +
											(totalPeople - people)  );
		if (!t.empty()) {
			while (!t.empty ()) {
				item = (Integer) t.dequeue ();
				outstandingWait += lastTime - item.intValue();
			}
			System.out.println(" with average waiting time = " +
								(float) outstandingWait / (totalPeople - people) + " minutes");
		}
		else {
			System.out.println(" with average waiting time = 0.0 minute");
		}

		System.exit(0);

	} // main

} // class SimBusStop