快速排序c++
时间: 2023-06-22 22:21:11 浏览: 114
好的,这里是快速排序的C++代码实现:
```c++
#include <iostream>
using namespace std;
int partition(int arr[], int low, int high) {
int pivot = arr[high];
int i = low - 1;
for (int j = low; j < high; j++) {
if (arr[j] < pivot) {
i++;
swap(arr[i], arr[j]);
}
}
swap(arr[i + 1], arr[high]);
return i + 1;
}
void quickSort(int arr[], int low, int high) {
if (low < high) {
int pi = partition(arr, low, high);
quickSort(arr, low, pi - 1);
quickSort(arr, pi + 1, high);
}
}
int main() {
int arr[] = {10, 7, 8, 9, 1, 5};
int n = sizeof(arr) / sizeof(arr[0]);
quickSort(arr, 0, n - 1);
cout << "Sorted array: \n";
for (int i = 0; i < n; i++) {
cout << arr[i] << " ";
}
cout << endl;
return 0;
}
```
快速排序是一种常用的排序算法,时间复杂度为O(nlogn),其中n为待排序数列的长度。
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