Question

JAVA Programming Assignment:

You run four computer labs. Each lab contains computer stations that are numbered as shown in the table below:-
Lab Number   Computer Station Numbers
1   1-5
2   1-6
3   1-4
4   1-3
Each user has a unique five-digit ID Number. Whenever a user logs on, the user's ID, Lab Number, and the computer station are transmitted to your station. For example, if user 49193 logs onto station 2 in Lab 3, your system receives (49193, 2, 3) as input data. Similarly, when a user logs off a station, your system receives the Lab Number and computer station number.
Write a Java program that could be used to track, by lab, which user is logged onto which computer. For example, if user 49193 is logged into station 2 in lab 3 and user 99577 is logged into station 1 of lab 4, then your system might display the following:-
Lab Number Computer Stations
1 1: empty 2: empty 3: empty 4: empty 5: empty
2   1: empty 2: empty 3: empty 4: empty 5: empty 6: empty
3   1: empty 2: 49193 3: empty 4: empty
4   1: 99577 2: empty 3: empty
TASK:-
1. Create a menu that allows the administrator to simulate the transmission of information by manually typing in the login or logoff data. Whenever someone logs in or out, the display table should be updated.
2. Write a search option so the administrator can type in a user Id and the system will output what Lab Number and station number the user is logged into, or "None" if the user Id is not logged into any computer station.
You should use a fixed array of length 4 for the labs. Each array entry points to a dynamic array that stores the user login information for each respective computer station.
Sample Output:- (User input is in bold and Italics)
LAB STATUS Lab # Computer Stations 1 1: empty 2: empty 3: empty 4: empty 5: empty 2 1: empty 2: empty 3: empty 4: empty 5: empty 6: empty 3 1: empty 2: empty 3: empty 4: empty 4 1: empty 2: empty 3: empty
MAIN MENU 0) Quit 1) Simulate login 2) Simulate logoff 3) Search 1 Enter the 5 digit ID number of the user logging in: 12345 Enter the lab number the user is logging in from (1-4): 2 Enter computer station number the user is logging in to (1-6): 3
LAB STATUS Lab # Computer Stations 1 1: empty 2: empty 3: empty 4: empty 5: empty 2 1: empty 2: empty 3: 12345 4: empty 5: empty 6: empty 3 1: empty 2: empty 3: empty 4: empty 4 1: empty 2: empty 3: empty
MAIN MENU 0) Quit 1) Simulate login 2) Simulate logoff 3) Search 2 Enter the 5 digit ID number of the user to find: 12345 User 12345 is logged off.
LAB STATUS Lab # Computer Stations 1 1: empty 2: empty 3: empty 4: empty 5: empty 2 1: empty 2: empty 3: empty 4: empty 5: empty 6: empty 3 1: empty 2: empty 3: empty 4: empty 4 1: empty 2: empty 3: empty
MAIN MENU 0) Quit 1) Simulate login 2) Simulate logoff 3) Search

Remember to write comments next to or above each line of code explaining what it does. Also remember to submit a picture of the sample output.

Answer 1

public class GlobalMembersC

{

// Show and get the user's menu selection.

                public static int get_menu()

                {

                int results;

                final int MENU = 3;

                do

                {

                System.out.print("0: Exit Program");

                System.out.print("\n");

                System.out.print("1: Enter user data");

                System.out.print("\n");

                System.out.print("2: Search user data");

                System.out.print("\n");

                System.out.print("3: Print chart");

                System.out.print("\n");

                System.out.print("Select the number you want then press enter: ");

                results = Integer.parseInt(ConsoleInput.readToWhiteSpace(true));

                } while (results < 0 && results > MENU);

                return results;

                }

// Store the data in the array.

                public static void store_data(int id, int station, int lab)

                {

                int[] temp = labs[lab - 1];

                temp[station - 1] = id;

                }

// Search for the user and print the chart.

                public static void search_user(int id)

                {

                int lab;

                int station;

                for (int i = 0; i < LABS; i++)

                {

                int[] temp = labs[i];

                for (int j = 0; j < lab_size[i]; j++)

                {

                if (temp[j] == id)

                {

                lab = i + 1;

                station = j + 1;

                break;

                }

                }

                }

                if (lab != 0 && station != 0)

                {

                System.out.print("User ");

                System.out.print(id);

                System.out.print(" is on lab ");

                System.out.print(lab);

                System.out.print(" and station ");

                System.out.print(station);

                System.out.print(".");

                System.out.print("\n");

                }

                else

                {

                System.out.print("User not login.");

                System.out.print("\n");

                }

                }

// Process what to do with the user's input.

                public static boolean process_menu(int input)

                {

                switch (input)

                {

                case 0:

                return false;

                case 1:

                int id;

                int station;

                int lab;

                System.out.print("If user ID is 0 that means they loged off.");

                System.out.print("\n");

                System.out.print("Enter the users ID: ");

                id = Integer.parseInt(ConsoleInput.readToWhiteSpace(true));

                System.out.print("Enter the station #: ");

                station = Integer.parseInt(ConsoleInput.readToWhiteSpace(true));

                System.out.print("Enter the lab #: ");

                lab = Integer.parseInt(ConsoleInput.readToWhiteSpace(true));

                store_data(id, station, lab);

                break;

                case 2:

                int user;

                System.out.print("Enter the user ID to search for: ");

                user = Integer.parseInt(ConsoleInput.readToWhiteSpace(true));

                search_user(user);

                break;

                case 3:

                print_data();

                break;

                }

                return true;

                }

                public static void set_data()

                {

                for (int i = 0;i < LABS;i++)

                {

                int answer;

                System.out.print("Enter the number of computers in lab ");

                System.out.print(i + 1);

                System.out.print(": ");

                answer = Integer.parseInt(ConsoleInput.readToWhiteSpace(true));

                lab_size[i] = answer;

                labs[i] = new int[answer];

                }

                }

// Prints the chart

                public static void print_data()

                {

                for (int i = 0; i < LABS; i++)

                {

                System.out.print("Lab ");

                System.out.print(i + 1);

                System.out.print(": ");

                int[] temp = labs[i];

                for (int j = 0; j < lab_size[i]; j++)

                {

                System.out.print("Station ");

                System.out.print(j + 1);

                System.out.print(": ");

                if (temp[j] == 0)

                {

                System.out.print("Empty ");

                }

                else

                {

                System.out.print(temp[j]);

                System.out.print(" ");

                }

                }

                System.out.print("\n");

                }

                }

                public static final int LABS = 4;

//int *labs[LABS];

                public static int[] labs = new int[LABS];

                public static int[] lab_size = new int[LABS];

                public static int Main()

                {

                set_data();

                while (process_menu(get_menu()));

                return 0;

                }

}