Construye un proyecto de una caja registradora - Build a Cash Register

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1

Cuéntanos qué está pasando:

I need help finishing this code. I’m trying to solve points 12, 17, 18 and 19. I’ve tried different ways and I still can’t solve it.

Tu código hasta el momento

let price = 19.5;
let cid = [
    ["PENNY", 1.01],
    ["NICKEL", 2.05],
    ["DIME", 3.1],
    ["QUARTER", 4.25],
    ["ONE", 90],
    ["FIVE", 55],
    ["TEN", 20],
    ["TWENTY", 60],
    ["ONE HUNDRED", 100]
];

const denominations = [
    ["ONE HUNDRED", 100],
    ["TWENTY", 20],
    ["TEN", 10],
    ["FIVE", 5],
    ["ONE", 1],
    ["QUARTER", 0.25],
    ["DIME", 0.1],
    ["NICKEL", 0.05],
    ["PENNY", 0.01]
];

document.getElementById('price').textContent = price.toFixed(2);

document.getElementById('purchase-btn').addEventListener('click', function () {
    const cash = parseFloat(document.getElementById('cash').value);  
    const changeDue = cash - price;  

    if (cash < price) {
        alert("Customer does not have enough money to purchase the item");
        document.getElementById('change-due').innerText = '';
        return;
    }

    if (cash === price) {
        document.getElementById('change-due').innerText = "No change due - customer paid with exact cash";
        return;
    }

    const result = calculateChange(changeDue, cid);

    if (result.status === "INSUFFICIENT_FUNDS") {
        document.getElementById('change-due').innerText = "Status: INSUFFICIENT_FUNDS";
    } else if (result.status === "CLOSED") {
        let changeString = `Status: CLOSED\n`;
        result.change.forEach(item => {
            changeString += `${item[0]}: $${item[1].toFixed(2)}\n`;
        });
        document.getElementById('change-due').innerText = changeString.trim();
    } else if (result.status === "OPEN") {
        let changeString = "Status: OPEN\n";
        result.change.forEach(item => {
            changeString += `${item[0]}: $${item[1].toFixed(2)}\n`;
        });
        document.getElementById('change-due').innerText = changeString.trim();
    }
});

function calculateChange(changeDue, cid) {
    let change = [];
    let totalCid = 0;

    for (let i = 0; i < cid.length; i++) {
        totalCid += cid[i][1];
    }

    if (totalCid < changeDue) {
        return { status: "INSUFFICIENT_FUNDS", change: [] };
    }

    if (totalCid === changeDue) {
        return { status: "CLOSED", change: cid };
    }

    for (let i = 0; i < denominations.length; i++) {
        const denom = denominations[i];
        const denomName = denom[0];
        const denomValue = denom[1];
        const denomAmount = cid[i][1];

        let changeForThisDenom = 0;

        while (changeDue >= denomValue && changeForThisDenom < denomAmount) {
            changeForThisDenom += denomValue;
            changeDue -= denomValue;
            changeDue = parseFloat(changeDue.toFixed(2)); 
        }
    
        if (changeForThisDenom > 0) {
            change.push([denomName, changeForThisDenom]);
        }
    }

    if (changeDue > 0) {
        return { status: "INSUFFICIENT_FUNDS", change: [] };
    }

    return { status: "OPEN", change: change };
}

<!-- file: index.html -->


/* file: script.js */


/* file: styles.css */

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Construye un proyecto de una caja registradora - Build a Cash Register

2

It would be great if you could also share your html

I’ve edited your code for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

Pre-formatted-text
Pre-formatted-text1356×380 401 KB

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (').