#include <stdio.h>
#include <stdlib.h>
// 比较函数，用于qsort排序
int compare(const void *a, const void *b) {
return *(int *)a - *(int *)b;
}
int main() {
int arr[] = {9, 5, 7, 3, 1};
int size = sizeof(arr) / sizeof(int);
printf("Before sorting:");
for (int i = 0; i < size; i++) {
printf("%d ", arr[i]);
}
qsort(arr, size, sizeof(int), compare);
printf("\nAfter sorting: ");
for (int i = 0; i < size; i++) {
printf("%d ", arr[i]);
}
return 0;
}
)
