Untitled

Actionscript3: Countdown number of ducks
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.text.TextField;

[SWF(width="800", height="600", backgroundColor="#E6FCFF")]

public class Main extends Sprite
{
    private var _sittingDucks:Array = []; //always set your arrays with [] at the top
    public var _scoreDisplay:TextField


    public function Main()
    {
        //adding the background, and positioning it
        var background:Background = new Background();
        this.addChild(background);
        background.x = 30;
        background.y = 100;

        for(var i:uint = 0; i < 5; i++)
        {
            //adding the first cloud, and positioning it
            var clouds:Clouds = new Clouds();
            this.addChild(clouds);
            clouds.x = 130 + Math.random() * 600; //130 to 730
            clouds.y = 230;
            clouds.speedX = Math.random() * 3;
            clouds.width = clouds.height = 200 * Math.random()//randomly changes the clouds demensions
        }

        var waves:Waves = new Waves();
        this.addChild(waves);
        waves.x = 0;
        waves.y = 510;
        waves.speedX = Math.random() * 3;


        for(var j:uint = 0; j < 8; j++)
        {
            var ducks:Ducks = new Ducks();
            this.addChild(ducks);
            ducks.x = 100 + j * 100;
            ducks.y = 475;
            _sittingDucks.push(ducks);
            ducks.addEventListener(MouseEvent.CLICK, ducksDestroy);
        }

        var waves2:Waves = new Waves();
        this.addChild(waves2);
        waves2.x = 0;
        waves2.y = 520;
        waves2.speedX = Math.random() * 3;

        var setting:ForeGround = new ForeGround();
        this.addChild(setting);
        setting.x = 0;
        setting.y = 50;
        setting.width = 920;

        var board:ScoreDisplay = new ScoreDisplay();
        this.addChild(board);
        board.x = 570;
        board.y = 35;

    }
    private function ducksDestroy(event:MouseEvent):void
    {
        //store the crow we clicked on in a new array
        var clickedDuck:Ducks = Ducks(event.currentTarget);

        //remove it from the crows array
        //find the address of the crow we are removing
        var index:uint = _sittingDucks.indexOf(clickedDuck);

        //remove it from the array with splice
        _sittingDucks.splice(index, 1);

        //remove it from my document's display list
        this.removeChild(clickedDuck);
    }
}


import flash.events.Event;
import flash.events.MouseEvent;
import flash.text.TextField;
import ScoreDisplayBase; // always import the classes you are using

public class ScoreDisplay extends ScoreDisplayBase
{
    private var txt:TextField; // where is it initialized?
    private var score:uint = 0;

    public function ScoreDisplay()
    {
        super(); // do you init txt here?
    }

    public function scoreUpdate():void
    {
        score += 10; // ok, so I suppose that your score does not represent the remaining ducks as you said, just only a score
        txt.text = score.toString();
    }
}

//you want a reference to the ScoreDisplay, not this
public var _scoreDisplay:TextField //no
public var _scoreDisplay:ScoreDisplay //yes

_scoreDisplay = :ScoreDisplay = new ScoreDisplay();
this.addChild(_scoreDisplay );
_scoreDisplay .x = 570;
_scoreDisplay .y = 35;

private function spawnDucks() {
    for(var j:uint = 0; j < 8; j++)
    {
        var ducks:Ducks = new Ducks();
        this.addChild(ducks);
        ducks.x = 100 + j * 100;
        ducks.y = 475;
        _sittingDucks.push(ducks);
        ducks.addEventListener(MouseEvent.CLICK, ducksDestroy);
    }
}

private function ducksDestroy(event:MouseEvent):void
{
    //store the crow we clicked on in a new array
    var clickedDuck:Ducks = Ducks(event.currentTarget);

    //remove it from the crows array
    //find the address of the crow we are removing
    var index:uint = _sittingDucks.indexOf(clickedDuck);

    //remove it from the array with splice
    _sittingDucks.splice(index, 1);

    //remove it from my document's display list
    this.removeChild(clickedDuck);

    //update the score
    _scoreDisplay.scoreUpdate();

    //Check if all the ducks are gone
    if (_sittingDucks.length == 0) {
        //All the ducks are dead, we've won the game!

        //create some kind of popup to display.
        //add it to the screen, have some form
        //of button (or a timer) take it away

        //whatever takes the popup away, have it call 'reset'

    }
}

private function reset():void
{
    //write a reset method to clear the score
    _scoreDisplay.reset();

    //create some ducks and you're ready to go!
    spawnDucks();
}