快速排序代码 c语言

以下是C语言实现的快速排序代码：

#include <stdio.h>

void quick_sort(int arr[], int left, int right) {
    if (left >= right) {
        return;
    }
    int i = left, j = right, pivot = arr[left];
    while (i < j) {
        while (i < j && arr[j] >= pivot) {
            j--;
        }
        arr[i] = arr[j];
        while (i < j && arr[i] <= pivot) {
            i++;
        }
        arr[j] = arr[i];
    }
    arr[i] = pivot;
    quick_sort(arr, left, i - 1);
    quick_sort(arr, i + 1, right);
}

int main() {
    int arr[] = {5, 2, 8, 4, 7, 1, 9, 3, 6};
    int len = sizeof(arr) / sizeof(arr[0]);
    quick_sort(arr, 0, len - 1);
    for (int i = 0; i < len; i++) {
        printf("%d ", arr[i]);
    }
    return 0;
}