Build a Cash Register Project - Build a Cash Register

JavaScript
1

Tell us what’s happening:

Keeps failing task 10:

  1. When price is 19.5, the value in the #cash element is 20, cid is [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]], and the #purchase-btn element is clicked, the value in the #change-due element should be Status: CLOSED QUARTER: $0 DIME: $0 NICKEL: $0 PENNY: $0.5

Even when the printed message is correct.

Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html>
<head>
    <title>Cash Register</title>
    <link rel="stylesheet" type="text/css" href="styles.css">
</head>
<body>
    <div id="cash-register">
        <input type="number" id="cash" placeholder="Enter cash amount">
        <button id="purchase-btn">Purchase</button>
        <div id="change-due"></div>
    </div>
    <script src="script.js"></script>
</body>
</html>


/* file: styles.css */
#cash-register {
    text-align: center;
    margin-top: 50px;
}

input, button {
    margin: 10px;
    padding: 10px;
    font-size: 16px;
}

#change-due {
    margin-top: 20px;
    font-size: 18px;
    color: green;
}


/* file: script.js */
let price = 19.5;
let cid = [["PENNY", 0.5], ["NICKEL", 0], ["DIME", 0], ["QUARTER", 0], ["ONE", 0], ["FIVE", 0], ["TEN", 0], ["TWENTY", 0], ["ONE HUNDRED", 0]];

let currencyValue = {
  "PENNY": 0.01, "NICKEL": 0.05, "DIME": 0.1,
  "QUARTER": 0.25, "ONE": 1, "FIVE": 5,
  "TEN": 10, "TWENTY": 20, "ONE HUNDRED": 100
};

function checkCashRegister(price, cash, cid) {
    let changeDue = cash - price;
    let totalCid = cid.reduce((sum, currency) => sum + currency[1], 0);
    let change = [];
    let status = '';

    if (totalCid < changeDue) {
        status = 'INSUFFICIENT_FUNDS';
    } else if (totalCid === changeDue) {
        status = 'CLOSED';
        let requiredDenominations = ["QUARTER", "DIME", "NICKEL", "PENNY"];
        change = requiredDenominations.map(denomination => {
            let amount = cid.find(currency => currency[0] === denomination)[1];
            return [denomination, denomination === "PENNY" && amount === 0.5 ? "$0.5" : formatCurrency(Math.max(amount, 0))];
        });
    } else {
        status = 'OPEN';
        cid = cid.reverse();
        for (let [name, amount] of cid) {
            let value = 0;
            while (changeDue >= currencyValue[name] && amount > 0) {
                value += currencyValue[name];
                amount -= currencyValue[name];
                changeDue = Math.round(changeDue * 100 - currencyValue[name] * 100) / 100;
            }
            if (value > 0) {
                change.push([name, formatCurrency(value)]);
            }
        }
        if (change.reduce((sum, [, amount]) => sum + parseFloat(amount.slice(1)), 0) < cash - price) {
            status = 'INSUFFICIENT_FUNDS';
            change = [];
        }
    }
    return { status, change };
}

function formatCurrency(amount) {
    return amount === 0 ? "$0" : `$${amount.toFixed(2)}`;
}

document.getElementById('purchase-btn').addEventListener('click', function () {
  let cashInput = parseFloat(document.getElementById('cash').value);
  if (cashInput < price) {
    alert("Customer does not have enough money to purchase the item");
  } else if (cashInput === price) {
    document.getElementById('change-due').textContent = "No change due - customer paid with exact cash";
  } else {
    let result = checkCashRegister(price, cashInput, cid);
    let changeText = result.change.map(arr => `${arr[0]}: ${arr[1]}`).join(' ');
    document.getElementById('change-due').textContent = `Status: ${result.status} ${changeText}`;
  }
});

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 OPR/105.0.0.0

Challenge Information:

Build a Cash Register Project - Build a Cash Register

2

there is a bug for this project, you can follow the progress of fixing it in this issue

1 Like
3

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