范围循环算法

import flash.events.MouseEvent;var arr:Array&＃61;[0,1,2,3,4,5,6,7];var num:Number&＃61;0;
this.stage.addEventListener(MouseEvent.CLICK,handleMouseClick);
function handleMouseClick(e:MouseEvent):void
{num&＃61;(num&＃43;1)%arr.length;trace(num);
}

输出结果&＃xff1a;

1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0

不错吧……