为什么小程序最后结果很奇怪？

# include <stdio.h>

# define N 10

void max_min (int a[], int n, int *max, int *min)
{
  int i;

  *max = a[0];
  *min = a[0];

  for (i = 1; i < n; i++) {
    *max = (*max <= a[i] ? a[i] : *max);
    *min = (*min <= a[i] ? *min : a[i]);
  }
}

int main (void)
{
  int i, a[N], big, small;

  printf("\n\t Enter %d numbers. ", N);
  for (i = 0; i < N; i++) {
    scanf("%d", &a[i]);
  }

  max_min(a, N, &big, &small);

  printf("\n\t the biggest number is: %d", big);
  printf("\n\t the smallest number is: %d", small);

  printf("\n\n");
  return 0;
}Copy