说明：  快速排序法通过一趟排序将要排序的数据分割成独立的两部分，其中一部分的所有数据都比另外一部分的所有数据都要小，然后再按此方法对这两部分数据分别进行快速排序，整个排序过程可以递归进行，以此达到整个数据变成有序序列。
(By sorting the data to be sorted into two separate parts, one part of all the data than the other part of all the data is small, and then press this method of these two parts of the data were quickly sorted, the entire sorting process can Recursive, in order to achieve the entire data into an orderly sequence.)