1.  /** Convert user's choice of direction to compass degrees 
        and do the computation.
    */
    public double doComputation(int dir)
    {
        CASE dir OF
            0:  RETURN bigCalc(0);
            1:  RETURN bigCalc(90);
            2:  RETURN bigCalc(180);
            3:  RETURN bigCalc(270);
            OTHERS: RETURN 0;
        ENDCASE
    }





2.  /* Shuffle the cards */
    private void shuffle(Card[] cardlist)
    {
        FOR size = cardlist length to 1 by -1 LOOP
            FOR index 1 to size LOOP
                IF cardlist[index] greater than cardlist[index + 1] THEN
                    SWAP cardlist[index] with cardlist[index + 1]
                END IF
            END LOOP
        END LOOP
    }





3.  /** Call the model to make the move for the selected button */
    public void actionPerformed(ActionEvent evt) 
    {
        SET sourceButton to evt.getSource()
        FOR each button in buttonList LOOP
            IF sourceButton = button THEN
                SET name = CALL button.getName() RETURNS String
            END IF
        END LOOP
        CALL game.move(name)
    }





4.  /** Insert a name into the proper position in the list */
    public void insert(String name)
    {
        ADD name to end of list
        CALL Collections.sort WITH list
    }





5.  /** Assign the number of points to the selected color */
    public void lookupPoints(String color)
    {
        SET names to array of "red","blue","green","yellow","orange","violet"
        SET points to array of 1,3,6,8,10,15
        
        FOR index IN 1 to names.length LOOP
            IF color = names[index] THEN
               return points[index]
            END IF
        END LOOP
    }        





6. 
/* This controller class updates the accordion model class when a user
 * interacts with either the console view or the swing GUI view
 */
public class AccordionController implements ActionListener 
{
    private AccordionModel model;
    private boolean cardSelected = false;
    private String card1;
    private String card2;

    /* This function notifies/updates the model when a user clicks on 2
     * cards, prompting a move in the swing UI version of the game
     */
    public void actionPerformed(ActionEvent evt) 
    {
        SET action to evt.getActionCommand()      
        IF action = "A" THEN
            IF cardSelected THEN
                IF card1 not "A" THEN
                    card2 = "A";
                    model.setCard(card1, card2);
                    cardSelected = false;
                ELSE 
                    PRINT "Invalid Move!"
                    cardSelected = false;
                END IF
            ELSE
                card1 = "A";
                cardSelected = true;
            END IF        
        ELSE IF action = "B" THEN
            IF cardSelected THEN
                IF card1 not "B" THEN
                    card2 = "B";
                    model.setCard(card1, card2);
                    cardSelected = false;
                ELSE 
                    PRINT "Invalid Move!"
                    cardSelected = false;
                END IF
            ELSE
                card1 = "B";
                cardSelected = true;
            END IF        
        ELSE IF action = "C" THEN
            IF cardSelected THEN
                IF card1 not "C" THEN
                    card2 = "C";
                    model.setCard(card1, card2);
                    cardSelected = false;
                ELSE 
                    PRINT "Invalid Move!"
                    cardSelected = false;
                END IF
            ELSE
                card1 = "C";
                cardSelected = true;
            END IF        
        ELSE IF action = "D" THEN
            IF cardSelected THEN
                IF card1 not "D" THEN
                    card2 = "D";
                    model.setCard(card1, card2);
                    cardSelected = false;
                ELSE 
                    PRINT "Invalid Move!"
                    cardSelected = false;
                END IF
            ELSE
                card1 = "D";
                cardSelected = true;
            END IF        
        ELSE IF action = "E" THEN
            IF cardSelected THEN
                IF card1 not "E" THEN
                    card2 = "E";
                    model.setCard(card1, card2);
                    cardSelected = false;
                ELSE 
                    PRINT "Invalid Move!"
                    cardSelected = false;
                END IF
            ELSE
                card1 = "E";
                cardSelected = true;
            END IF        

         ... (twenty-one more times)
   }
}    






SOLUTIONS

1. dir * 90
 
2. Collections.shuffle()
 
3. CALL sourceButton.getName()
 
4. list.insert(name)
 
5.  map.get(color)

6.  Move to Model:
    IF card1 not action THEN
        card2 = action
        move(card1,card2)