代码1：基于顺序容器vector

  1 /*
  2  * FILE: quick_sort_vector.cpp
  3  * ---------------------------
  4  * DATE: 20170818
  5  * 快速排序，基于顺序容器vector
  6  */
  7 
  8 #include <iostream>
  9 #include <vector>
 10 
 11 /*
 12  * Implementation notes: partition
 13  * -------------------------------
 14  * This function rearrange the elements of the vector 
 15  */
 16 
 17 int partition(std::vector<int> &v, int begin, int end)
 18 {
 19         int pivot = v[begin];
 20         int left = begin + 1;
 21         int right = end;
 22         while(true)
 23         {
 24                 while(left < right && v[right] >= pivot)
 25                         right--;
 26                 while(left < right && v[left] < pivot)
 27                         left++;
 28                 if(left == right)
 29                         break;
 30                 std::swap(v[left], v[right]);
 31         }
 32         if(v[left] >= pivot)
 33                 return begin;
 34         v[begin] = v[left];
 35         v[left] = pivot;
 36         return left;
 37 }
 38 
 39 /*
 40  * Implementation notes: quickSort
 41  * -------------------------------
 42  * This function sorts the elements in the vector between 
 43  * index position begin and end, inclusive
 44  */
 45 void quickSort(std::vector<int> &v, int begin, int end)
 46 {
 47         if(begin >= end)
 48                 return;
 49         int boundary = partition(v, begin, end);
 50         quickSort(v, begin, boundary - 1);
 51         quickSort(v, boundary + 1, end);
 52 }
 53 
 54 /*
 55  * Implemention notes: sort
 56  * ------------------------
 57  * This function sorts the elements of the vector into 
 58  * increasing numerical order using the QuickSort algorithm
 59  */
 60 void sort(std::vector<int> &v)
 61 {
 62         quickSort(v, 0, v.size() - 1);
 63 }
 64 
 65 void display(std::vector<int> &v)
 66 {
 67         for(std::vector<int>::iterator iter= v.begin(); iter != v.end(); iter++ )
 68                 std::cout<< *iter << "  ";
 69         std::cout<< std::endl;
 70 }
 71 
 72 int main(int argc, char *argv[])
 73 {
 74         int a[] ={3,4,2,1,7,5,8,9,0,6};
 75         std::vector<int> vec(a, a+10);
 76         sort(vec);
 77         display(vec);
 78         return 0;
 79 }

代码2：基于数组array

  1 /*
  2  * FILE: quick_sort.cpp
  3  * --------------------
  4  * DATE: 20170818
  5  *
  6  *
  7  */
  8 
  9 #include <iostream>
 10 
 11 void quickSort(int a[], int begin, int end);
 12 
 13 int main(int argc, char *argv[])
 14 {
 15         int a[] = {3,4,2,1,7,5,8,9,0,6};
 16         int length = sizeof(a) / sizeof(int);
 17 
 18         quickSort(a, 0, length-1);      // 快速排序
 19 
 20         for(int i = 0; i < length; i++)
 21                 std::cout<< a[i] << "  ";
 22         std::cout<< std::endl;
 23         return 0;
 24 }
 25 
 26 /* 快速排序 */
 27 void quickSort(int a[], int begin, int end)
 28 {
 29         if(begin >= end)
 30                 return;
 31         int left = begin, right = end;
 32         int pivot_value = a[left];
 33         while(left < right)
 34         {
 35                 if(a[left+1] < pivot_value)
 36                 {
 37                         a[left] = a[left+1];
 38                         left++;
 39                 }
 40                 else if(a[left+1] >= pivot_value)
 41                 {
 42                         std::swap(a[left+1], a[right]); // std::swap()
 43                         right--;
 44                 }
 45         }
 46         a[left] = pivot_value;
 47         quickSort(a, begin, left-1);    // 递归
 48         quickSort(a, left+1, end);
 49 }