单选题

下面代码输出结果正确的是functionSetcount(count){t...

Question

下面代码输出结果正确的是

 

function Setcount(count){

this.count=count

}

Setcount.prototype.printCount=function(){

console.log(this.count)

}

let a = new Setcount(100)

a.count =200

a.__proto__.count=300

a.__proto__.printCount()

a.printCount()

A.

100,200

B.

200,300

C.

300,200

D.

100,300