代码

#include <stdio.h>
#include <stdlib.h>

int cmp(const void *a, const void *b) {
  unsigned tmp = (*((unsigned *) a))  - (*((unsigned *) b));
  return tmp < 0 ? -1 : tmp > 0;
}
void sort(unsigned *a, int n) {
  qsort(a, n, sizeof (unsigned), cmp);
}

评测结果