c语言代码解决问题

解题思路:

注意事项:

参考代码:

#include<stdio.h>

#include<stdlib.h>

int compare(const void* a, const void* b)

{

    int num_a = *(int*)a;

    int num_b = *(int*)b;

    if (num_a < num_b)

        return -1;

    else if (num_a > num_b)

        return 1;

    else

        return 0;

}

int main()

{

    int n, * a,i;

    scanf("%d", &n);

    a = (int *)malloc(n * sizeof(int));

    for (i = 0; i < n; i++)

        scanf("%d", &a[i]);

    qsort(a, n, sizeof(int), compare);

    i = 0;

    while (1)

    {

        while (a[i] == a[i + 1])

        {

            i++;

        }

        printf("%d ", a[i]);

        if (i == n - 2)

        {

            printf("%d", a[n - 1]);

            i++;

        }

        if (i == n - 1)

            break;

        i++;

    }

    return 0;

}