KarelDefendsDemocracy

import stanford.karel.*;
/* karelDefendsDemocracy:
 * karel will go through the punch card and remove any
 * chad.
 */
public class karelDefendsDemocracy extends SuperKarel {
    public void run(){
        move();
        checkForChad();
        workThroughBallot();
    }
/*
 * checkForChad:
 * karel will check to see if there are any chad
 * in the ballot space she is in.
 *
 * pre-conditions: karel must be facing east and standing
 * in the middle slot of the ballot space.
 *
 * post-conditions: karel will be in the the middle slot
 * of the same ballot space and be facing east
 */
    private void checkForChad(){
        if (noBeepersPresent()){
            checkRight();
            checkLeft();
        }
    }
/*
 * checkRight:
 * checks slot on karels right for chad.
 *
 * pre-conditions: karel must be in the center slot of
 * ballot space and be facing east, and center slot
 * must be clear.
 *
 * post-conditions: same as pre-conditions
 */
    private void checkRight(){
        turnRight();
        move();
        if (beepersPresent()){
            while (beepersPresent()){
                pickBeeper();
            }
            turnAround();
            move();
            turnRight();
        } else {
            turnAround();
            move();
            turnRight();
        }
    }
/*
 * checkLeft:
 * checks the slot on karels left for chad.
 *
 * pre-conditions: karel must be in the center slot of
 * ballot space and be facing east, and center slot
 * must be clear.
 *
 * post-conditions: same as pre-conditions
 */
    private void checkLeft(){
        turnLeft();
        move();
        if (beepersPresent()){
            while (beepersPresent()){
                pickBeeper();
            }
            turnAround();
            move();
            turnLeft();
        } else {
            turnAround();
            move();
            turnLeft();
        }
    }
/*
 * workThroughBallot:
 * karel will make her way through the rest of the ballot
 * check for chad as she goes along.
 *
 * pre-conditions: karel must be facing east and font must
 * be clear.
 *
 * post-conditions: karel will be facing east and front
 * will be blocked
 */
    private void workThroughBallot(){
        while (frontIsClear()){
            move();
            if (frontIsClear()){
                move();
            }
            checkForChad();
        }
    }
}