面试题1

var num=20;//60
var obj={
num:30,
fn:(function(num){//20
//console.log(num,this.num);
this.num *=3;//60
num+=15;//35
var num=45;//45
return function(){
this.num*=4;//240 120
num+=20;//65 85
//console.log(num,this.num);//65 240
console.log(num);//65
}
})(num)//20
}
var fn=obj.fn;
console.log(num);
fn();//num->65
obj.fn();//85