// TO DO: add your implementation and JavaDocs

public class MyAbacus implements Abacus {

// ADD MORE PRIVATE MEMBERS HERE IF NEEDED! // Remember: Using an array in this class = no credit on the project! public MyAbacus(int base) { // throws IllegalArgumentException if base is invalid // remember: an abacus should always have at least one // column! } public int getBase() { // O(1) return -1; //default return, make sure to remove/change }

public int getNumPlaces() { // O(1) return -1; //default return, make sure to remove/change } public int getBeadsTop(int place) { // O(1) return -1; //default return, make sure to remove/change } public int getBeadsBottom(int place) { // O(1) return -1; //default return, make sure to remove/change } public boolean equals(MyAbacus m) { // O(N) where N is the number of places currently // in use by the abacus return false; //default return, make sure to remove/change } public DynArr310 add(String value) { // Hints: // see: https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#parseInt-java.lang.String-int- // and: https://docs.oracle.com/javase/8/docs/api/java/lang/String.html#charAt-int- // Also... I personally found a recursive helper function really, really useful here... // Important: each Abacus in the DynArr310 returned should // be a copy of this abacus. If you just add this abacus over and over // you'll just get the final abacus shown multiple times in the GUI.

return null; //default return, make sure to remove/change } // -------------------------------------------------------- // example testing code... edit this as much as you want! // -------------------------------------------------------- public static void main(String[] args) { //this is the sequence from the project description Abacus a = new MyAbacus(10); DynArr310 steps; AbacusGUI.printAbacus(a); AbacusGUI.fullPrintAdd(a, "36"); AbacusGUI.fullPrintAdd(a, "12"); AbacusGUI.fullPrintAdd(a, "2"); AbacusGUI.fullPrintAdd(a, "12"); AbacusGUI.fullPrintAdd(a, "10"); AbacusGUI.fullPrintAdd(a, "2"); AbacusGUI.fullPrintAdd(a, "68"); AbacusGUI.fullPrintAdd(a, "50"); AbacusGUI.fullPrintAdd(a, "10"); AbacusGUI.fullPrintAdd(a, "5"); AbacusGUI.fullPrintAdd(a, "3"); AbacusGUI.fullPrintAdd(a, "128"); AbacusGUI.fullPrintAdd(a, "3000000"); } }

Please follow the instructions in the comments using the data structures concept in java. Thank you