JS闭包面试题怎么解

1、下面是关于上题出的一些运行执行结果的运算，先把结果写出来var one = fun(0); one.fun(1); one.fun(2); one.fun(3);var two = fu荏鱿胫协n(0) two.fun(1) two.fun(2) two.fun(3);var three = fun(0) three.fun(1); three.fun(2);分别写出结果，//one: undefined,0,0,0//two: undefined,0,1,2//three: undefined,0,1,1