用C语言写一段冒泡排序算法

#include <stdio.h>

void bubble_sort(int arr[], int n) {
int i, j, temp;
for(i = 0; i < n-1; i++) {
for(j = 0; j < n-i-1; j++) {
if(arr[j] > arr[j+1]) {
temp = arr[j];
arr[j] = arr[j+1];
arr[j+1] = temp;
}
}
}
}

int main() {
int arr[] = {10, 5, 8, 20, 2};
int n = sizeof(arr)/sizeof(arr[0]);
int i;

printf("Before sorting: ");
for(i = 0; i < n; i++)
printf("%d ", arr[i]);

bubble_sort(arr, n);

printf("\nAfter sorting: ");
for(i = 0; i < n; i++)
printf("%d ", arr[i]);

return 0;
}