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Thread: binary search tree to store club members and display membership ID and names

  1. #1
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    Default binary search tree to store club members and display membership ID and names

    I have been tasked to create a ClubMember class that represents a member of a fitness club and a tree class to use in the ClubMember class along with a menu that prompts the user to 1) Enter a new member. 2) Display the membership list. 3) Exit the program. I must use a binary search tree to store a set of club members based on their membership ID number and display the membership ID along with the name of the club member. This is what I have so far:
     
     
    import java.io.*;
    import java.util.ArrayList;
    import java.util.Iterator;
    import java.util.List;
     
    public class ClubMember {  //creates clubMember class/
     
    public static void main(String[] args)
    {
    DataOutputStream ostream;
     
    final int DONE = 999;
    int id;
    String lastName;
    String firstName;
     
    try
    {
    ostream = new DataOutputStream
    (new FileOutputStream("MemID.dat"));
    System.out.print("Enter ID number or " + DONE + " to quit >> ");
    //id = input.nextInt();
    while(id != DONE)
    {
    //input.nextLine();
    System.out.print("Enter last name              >> ");
    //lastName = input.nextLine();
    System.out.print("Enter first name             >> ");
    firstName = input.nextLine();
    ostream.writeInt(id);
    ostream.writeUTF(lastName);
    ostream.writeUTF(firstName);
    System.out.print("Enter ID number or " + DONE + " to quit >> ");
    id = input.nextInt();
    }
    ostream.close();
    }
    catch(IOException e)
    {
    System.err.println("Error opening file");
    }
    catch(InputMismatchException e)
    {
    System.err.println("Invalid data entry");
    }
    }
    }

    I'm not sure where to place the menu or the binary search tree, could anyone give me a hand? Thanks


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: binary search tree to store club members and display membership ID and names

    The BST should be in its own class.

    The menu could be in a method that is used to get user input.

    BTW The code is not properly formatted. Nested statements should be indented 3-4 spaces.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: binary search tree to store club members and display membership ID and names

    Thanks, I usualy format after I get the code to compile and run (I know it's a bad habit) it helps me see things line by line.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: binary search tree to store club members and display membership ID and names

    it helps me see things line by line.
    That's strange. Most of us need the indentation to see the logic of a program. Without that it is very hard to understand the program's structure. Personally I won't try to work with unformatted code. It's just too hard to understand.
    If you don't understand my answer, don't ignore it, ask a question.

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