Question

Suppose there is only one customer service available in SAMBA Bank in Thursday morning, in every 4 minutes a new customer arrives at the end of waiting line, each customer will need 7 minutes for the service

Write a program to print out the information after the first 60 minutes

o The time of arriving for each customer

o The time of leaving for each customer

o How many customers are in the line?

o Who is the current serving customer?

Programming language: netbeans

Hint : use queue concept

Answer 1

• I have pasted the code and screenshot of sample run below.
• In case of any doubts just comment down.

----------------------Screenshot--------------------------

------------------CustomerService.java---------------------

import java.util.LinkedList;

import java.util.Queue;

class Customer{

public static int count = 0;

public int enterTime, leaveTime;

public int id;

}

public class CustomerService{

public static void main(String[] args) {

Queue<Customer> q = new LinkedList<>();

Customer curr = null;

int endTime = 60;

for(int i=0;i<=endTime;i++){

if(i%4==0){

Customer c = new Customer();

c.id = Customer.count;

Customer.count++;

c.enterTime = i;

q.add(c);

System.out.println("t=" + i + " " + "Customer #" + c.id + " entered queue");

}

if(i%7==0){

if(curr!=null){

System.out.println("t=" + i + " " + "Customer #" + curr.id + " left");

}

curr = q.remove();

System.out.println("t=" + i + " " + "Customer #" + curr.id + " is being served");

}

}

}