冒泡排序 Bubble sort

      static void bubble_sort(int[] unsorted) {
            boolean flag;
            for (int i = 0; i < unsorted.Length; i++) {
                flag = false;
                for (int j = i; j < unsorted.Length; j++) {
                    if (unsorted[i] > unsorted[j]) {
                        int temp = unsorted[i];
                        unsorted[i] = unsorted[j];
                        unsorted[j] = temp;
                        flag = true
                    }
                }
                if (!flag) {
                    return;
                }
            }
        }