var a:int=0, b, c:Number=2; trace(a,b,c) /* 0 undefined 2 */ var a:int, b:uint, c:Number; var d:String, e:Boolean; var f:Array; var g:Object; var h; var i:*; trace(a); //int 型,默认值为:0 trace(b); //unit型,默认值为:0 trace(c); //Number 型,默认值为:NaN trace(d); //…