// sortAndGetLargest.ts

function swap(arr: number[], i: number, j: number): void {
    const tmp: number = arr[i];
    arr[i] = arr[j];
    arr[j] = tmp;
}

function sortAndGetLargest(arr: number[]): number {
    if (arr.length === 0) {
        throw new Error("Array must not be empty");
    }

    // Sort the array in descending order
    for (let i = 0; i < arr.length; i += 1) {
        for (let j = i + 1; j < arr.length; j += 1) {
            if (arr[i] < arr[j]) {
                swap(arr, i, j);
            }
        }
    }

    // The largest element is now at index 0
    return arr[0];
}

const largest: number = sortAndGetLargest([99, 2, 43, 8, 0, 21, 12]);
console.log(largest); // should be 99, but prints 0