as3中的二维数据

var m:int = 2;
var n:int = 2;
var arr:Array = new Array();
// arr[0] = ["a","b"];
// arr[1] = ["c","d"];
var num:int = 0;
for (var i:int = 0; i < m; i++)
{
var temp:Array  = new Array();
for (var j:int=0;j<n;j++)
temp[j] = num;
arr[i] = temp;
}

for (var i:int = 0; i < m; i++)
for (var j:int=0;j<n;j++)
trace(arr[i][j]);