代码

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

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

评测结果