for int for int if arr arr int tmp arr arr arr arr tmp

for (int k = 0; k < n - 1; k++) {
    for (int j = 0; j < n - 1; j++) {
        if (arr[j+1] > arr[j]) {
            int tmp = arr[k];
            arr[k] = arr[j];
            arr[j] = tmp;
        };
    };
};