Actionscript中delete关键字例子

var a:int = 5;
var b:int = 9;
var c:int = 7;
//定义一个临时变量
var t:int;
if (a>b) {
?t = a;
?a = b;
?b = t;
}
if (a>c) {
?t = a;
?a = c;
?c = t;
}
if (b>c) {
?t = b;
?b = c;
?c = t;
}
//删除临时变量
delete t;
trace(a,b,c);//5,7,9