JavaScript Algorithms and Data Structures Projects - Cash Register

JavaScript
1

Tell us what’s happening:
I am getting this error, i dont know what is wrong with my code
ERROR:
Failed:checkCashRegister(3.26, 100, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]) should return {status: "OPEN", change: [["TWENTY", 60], ["TEN", 20], ["FIVE", 15], ["ONE", 1], ["QUARTER", 0.5], ["DIME", 0.2], ["PENNY", 0.04]]}.

My code:

function checkCashRegister(price, cash, cid) {
  const currencyUnits = [
    ["PENNY", 1],
    ["NICKEL", 5],
    ["DIME", 10],
    ["QUARTER", 25],
    ["ONE", 100],
    ["FIVE", 500],
    ["TEN", 1000],
    ["TWENTY", 2000],
    ["ONE HUNDRED", 10000]
  ];

  let changeDue = (cash - price) * 100; // Convert to cents
  let remainingChange = changeDue; // Track remaining change
  let change = [];
  let totalCid = 0;

  for (let i = 0; i < cid.length; i++) {
    totalCid += cid[i][1] * 100; // Convert to cents
  }

  if (changeDue > totalCid) {
    return { status: "INSUFFICIENT_FUNDS", change: [] };
  } else if (changeDue === totalCid) {
    return { status: "CLOSED", change: cid };
  } else {
    for (let i = currencyUnits.length - 1; i >= 0; i--) {
      const unitName = currencyUnits[i][0];
      const unitValue = currencyUnits[i][1];
      const availableAmount = cid[i][1] * 100; // Convert to cents

      if (remainingChange >= unitValue) {
        const numberOfUnits = Math.floor(availableAmount / unitValue);

        if (numberOfUnits > 0) {
          const changeAmount = Math.min(
            remainingChange,
            numberOfUnits * unitValue
          );
          change.push([unitName, changeAmount / 100]); // Convert back to dollars
          remainingChange -= changeAmount; // Update remainingChange
          
          // Update cid array
          cid[i][1] -= changeAmount / 100; // Convert back to dollars
        }
      }
    }

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

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

// Example usage
const result = checkCashRegister(3.26, 100, [
  ["PENNY", 1.01],
  ["NICKEL", 2.05],
  ["DIME", 3.1],
  ["QUARTER", 4.25],
  ["ONE", 90],
  ["FIVE", 55],
  ["TEN", 20],
  ["TWENTY", 60],
  ["ONE HUNDRED", 100]
]);
console.log(result);

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Challenge: JavaScript Algorithms and Data Structures Projects - Cash Register

Link to the challenge:

2

Hi @asherhayat85,

Welcome to the forums! When I look at the output of your code, in the FIVE array, it is 16.74 for the test that it is failing on. Instead, that $1.74 extra that is currently in the FIVE array should be going into the ONE, QUARTER, DIME, and PENNY properties.

3

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