参考回答：
int once_quick_sort(vector<int> &data, int left, int right){int key = data[left];while (left < right){while (left < right && key <= data[right]){right--;}if (left < right){data[left++] = data[right];}while (left < right && key > data[left]){left++;}if (left < right){data[right--] = data[left];}}data[left] = key;return left;}int quick_sort(vector<int> & data, int left, int right){if (left >= right ){return 1;}int middle = 0;middle = once_quick_sort(data, left, right);quick_sort(data, left, middle-1);quick_sort(data, middle + 1, right);}；
