Trying to solve calculating the discount in JavaScript

Question

A store manager needs a program to set discounts for products.
The program should take the product ID, price and discount as input and output the discounted price. However, the changePrice method, which should calculate the discount, is incomplete. Fix it!

Sample Input
LD1493
1700
15

Sample Output
LD1493 price: 1700

LD1493 new price: 1445function main() {
var prodID = readLine();
var price = parseInt(readLine(),10);
var discount = parseInt(readLine(),10);

var prod1= new Product(prodID, price);
console.log(prod1.prodID + " price: " + prod1.price);

prod1.changePrice(discount);
console.log(prod1.prodID + " new price: " + prod1.price);
}

function Product(prodID, price) {
this.prodID = prodID;
this.price = price;

this.changePrice = function(discount) {
//your code goes here

this.price = price;
}
}

its ouputting the same price

Answer 1

this is a complete solution:

function main() {
var prodID = readLine();
var price = parseInt(readLine(),10);
var discount = parseInt(readLine(),10);

var prod1= new Product(prodID, price);
console.log(prod1.prodID + " price: " + prod1.price);

prod1.changePrice(discount);
console.log(prod1.prodID + " new price: " + prod1.price);
}

function Product(prodID, price) {
this.prodID = prodID;
this.price = price;

this.changePrice = function(discount) {
//your code goes here
this.price =this.price - this.price * discount/100;
}
}

Answer 2

Share more detail than just saying it does not work. Share any error messages. Share the output. If it just printed the same price before, it is hard to imagine this not working.

Below is code that prints out:
LD1493 price: 1700
LD1493 new price: 1685

I tested it using Sololearn's Code Playground nodejs feature. I'm not sure where your readLine function is coming from so I simulated it. I also added a call to main() so it would actually run.
var lines = [
'LD1493',
'1700',
'15'
];
var lineIndex = 0;
function readLine() {
return lines[lineIndex++];
}

function main() {
var prodID = readLine();
var price = parseInt(readLine(),10);
var discount = parseInt(readLine(),10);

var prod1= new Product(prodID, price);
console.log(prod1.prodID + " price: " + prod1.price);

prod1.changePrice(discount);
console.log(prod1.prodID + " new price: " + prod1.price);
}

function Product(prodID, price) {
this.prodID = prodID;
this.price = price;

this.changePrice = function(discount) {
//your code goes here
this.price = this.price - discount;
}
}

main();

Answer 3

do this !!
this.price = price - (price * discount / 100);

Answer 4

Have you tried replacing your definition of changePrice with this?

this.changePrice = function(discount) {
//your code goes here
this.price = this.price - discount;
}

Answer 5

Josh Greig it still did not work

Answer 6

function main() {
var prodID = readLine();
var price = parseInt(readLine(),10);
var discount = parseInt(readLine(),10);

var prod1= new Product(prodID, price);
console.log(prod1.prodID + " price: " + prod1.price);

prod1.changePrice(discount);
console.log(prod1.prodID + " new price: " + prod1.discount);
}

function Product(prodID, price) {
this.prodID = prodID;
this.price = price;

this.changePrice = function(discount) {
this.discount =this.price - this.price * discount/100;
}
}

Answer 7

i stuck in this exercise. I have not any output. I tried anything. Is this broken on what???