0727-Flash-加一減一回到0練習

語法:

var aa:Number;
aa=0;
txtNum.text=aa.toString();

btnAdd.addEventListener(MouseEvent.CLICK,addCount);
function addCount(e:MouseEvent)
{trace("抓到了!");
aa=aa+1;
txtNum.text=aa.toString();
}

btnSub.addEventListener(MouseEvent.CLICK,subCount);
function subCount(e:MouseEvent)
{trace("逃走了!");
aa=aa-1;
txtNum.text=aa.toString();
}


btnReset.addEventListener(MouseEvent.CLICK,resetCount);
function resetCount(e:MouseEvent)
{trace("重來!");
aa=0;
txtNum.text=aa.toString();
}