Question

Can anyone help me with rewriting my pseudocode? Below is the pseudocode, and after that is the completed program.

Pseudocode:

DISPLAY Login information

PROMPT for username/password

           output "Enter Username"

           input userName

         output "Enter password: "

        input password

//If successful, display information pertaining to the specific user, as well as prompt for logout

  

IF User type 'quit'

     Exit Program

  

VALIDATE User Credentials

  IF NOT Validated

     Check number of Invalid Attempts

        IF user attempts equal three THEN

           DISPLAY error message

           output "You have reached the maximum number of login attempts, please contact your system administrator"

           EXIT program

                       

        ELSE

           DECREMENT Login attempts by one

           //Inform User of remaining attempts

           output "# attempts remaining"

           LOOP to VALIDATE Credentials

        ENDIF

  ELSE

SET Username

MATCH Corresponding Role

DISPLAY Welcome message

ELSE

IF User type 'quit'

     Exit Program

                       

Completed Program:

    public static void main(String[] args) throws Exception

       {

        //Scanner object that reads input

            Scanner readInput=new Scanner(System.in);

            //Keeps track of number of attempts

            int attempts=0;

            while(true)

            {

                //PROMPT for username/password

                System.out.print("Enter username: ");

                String uName=readInput.nextLine();

                System.out.print("Enter password: ");

                String original = readInput.nextLine();

                //Convert the password with MD5hash

                MessageDigest md = MessageDigest.getInstance("MD5");

                md.update(original.getBytes());

                byte[] digest = md.digest();

                StringBuffer sb = new StringBuffer();

                for (byte b : digest)

                {

                     sb.append(String.format("%02x", b & 0xff));

                }

                //Keep track whether login is successful or not

                boolean authenticationSuccess=false;

                Scanner readCred=new Scanner(new File("Credentials.txt"));

                while(readCred.hasNextLine())

                {

                     String record=readCred.nextLine();

                     String columns[]=record.split("\t");

                     //Check user name.

                     if(columns[0].trim().equals(uName))

                     {

                          if(columns[1].trim().equals(sb.toString()))

                          {

                               authenticationSuccess=true;

                               //Open the job file

                               Scanner readRole=new Scanner(new File(columns[3].trim()+".txt"));

                               //Display the information per job

                               while(readRole.hasNextLine())

                               {

                                    System.out.println(readRole.nextLine());

                               }

                               break;

                          }

                     }

                }

                //Prompt user to logout

                if(authenticationSuccess)

                {

                     System.out.println("Logout? (y/n): ");

                     String choice=readInput.nextLine();

                     if(choice.toLowerCase().charAt(0)=='y')

                     {

                          System.out.println("You have logged out");

                          break;

                     }

                     else

                     {

                          authenticationSuccess=false;

                     }

                }

                else

                {

                     attempts++;

                     //Maximum attempts, exit program

                     if(attempts==3)

                     {

                          System.out.println("You have reached the maximum number of login attempts, please contact your system administrator.");

                          break;

                     }

                     else

                     {

                          System.out.println("Try again!");    

                     }

                }

            }

       }

}

Answer 1

Here is the pseudocode I wrote:

In the main function

Initialize attempts to 0;

while true

print promt "Enter username"

Input username as uName

print promt "Enter password"

Input password as original

Create MessageDigest md

Update md to original

Create byte[] digest for md

Create a StringBuffer

for byte b : digest

Append String to sb

Initialize authenticationSuccess to false

Create scanner readCred for file Credentials.txt

while readCred.hasNextLine()

Let record read each line from file at a time

Let columns be an array which contains words in line

if columns[0] trimmed is equal to uName

if columns[1] trimmed is equal to sb

authenticationSuccess = true;

Open Job file with scanner readRole

Display information per job

if authenticationSuccess is true

print prompt "Logout? (y/n) : "

Read choice from user

convert choice to lowercase

if choice is equal to y

print prompt "You have logged out"

else

authenticationSuccess = false

else

Increment attempts by 1

if attempts == 3

print prompt "You have reached the maximum number of login attempts, please contact your system admin"

Break;

else

print prompt "Try again"