public static void main(String[] args){
        QuickSort test = new QuickSort();
        int[] arr = {3,1,2,5,67,2,1,32,456,1,12,3};
        for(int i = 0; i < arr.length; i++){
            System.out.print(arr[i] + " ");
        }
        System.out.println();

        test.quickSort(arr);
        for(int i = 0; i < arr.length; i++){
            System.out.print(arr[i] + " ");
        }
    }