程序代码：

/*
程序名：双向链表的创建与输出
作者：Yucoat
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define SIZE 20
#define MALLOCMEMORY (SqList *)malloc(sizeof(SqList))

typedef struct SqList SqList;
struct SqList
{
    char name[SIZE];
    SqList *last;
    SqList *next;
};

//初始化链表
SqList *InitSqList(SqList *h, SqList *t);
//输出链表
void ShowSqList(SqList *h);

int main()
{
    SqList *head = NULL, *tail = NULL;
    head = InitSqList(head, tail);

    ShowSqList(head);            //顺序输出链表
    ShowSqList(tail);            //逆序输出链表

    return 0;
}

SqList *InitSqList(SqList *h,SqList *t)
{
    SqList *p1 = NULL, *p2 = NULL;
    char temp[SIZE];

    p1 = p2 = MALLOCMEMORY;
    printf("请输入名字：");
    scanf("%s", p2->name);
    p2->last = NULL;
    p2->next = NULL;
    t = p2;                    //尾指针指向p2

    while (1)
    {
        if (h == NULL)         //如果链表为空，接表头
        {
            h = p2;
        }
        else                   //如果链表不为空，接表尾
        {
            t = p2;
        }
        printf("请输入名字：");
        scanf("%s", temp);

        if (temp[0] != '#')    //如果输入的字符串以#开头,结束
        {
            p2 = p1->next;
            p2 = MALLOCMEMORY;
            strcpy(p2->name, temp);
            p2->last = p1;
            p2->next = NULL;
            p1 = p1->next;
        }
        else
        {
            break;
        }

    }
    return h;
}

void ShowSqList(SqList *h)
{
    SqList *temp = h;
    while (temp->next != NULL)
    {
        printf("%s", temp->name);
        temp = temp->next;
    }
}

程序代码：

/*
程序名：双向链表的创建与输出
作者：Yucoat
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define SIZE 20
#define MALLOCMEMORY (SqList *)malloc(sizeof(SqList))

typedef struct SqList SqList;
struct SqList
{
    char name[SIZE];
    SqList *last;
    SqList *next;
};

//初始化链表
SqList *InitSqList(SqList *h, SqList **t);
//输出链表
void ShowSqList(SqList *h);

int main(void)
{
    SqList *head = NULL, *tail = NULL;
    head = InitSqList(head, &tail);

    ShowSqList(head);            //顺序输出链表
    ShowSqList(tail);            //逆序输出链表

    return 0;
}

SqList *InitSqList(SqList *h,SqList **t)
{
    SqList *p1 = NULL, *p2 = NULL;
    char temp[SIZE];

    p2 = MALLOCMEMORY;
    printf("请输入名字：");
    scanf("%s", p2->name);
    p2->last = NULL;
    p2->next = NULL;
    *t = p2;                    //尾指针指向p2

    while (1)
    {
        if (h == NULL)         //如果链表为空，接表头
        {
            h = p2;
        }
        else                   //如果链表不为空，接表尾
        {
            *t = p2;
        }
        printf("请输入名字：");
        scanf("%s", temp);

        if (temp[0] != '#')    //如果输入的字符串以#开头,结束
        {
            //p2 = p1->next;
            p1 = MALLOCMEMORY;
            strcpy(p1->name, temp);
            p1->last = p2;
            p1->next = p2->next;
            p2->next = p1;

            p2 = p1;
        }
        else
        {
            break;
        }

    }
    return h;
}

void ShowSqList(SqList *h)
{
    SqList *temp = h;
    if (temp->next != NULL)
    {
        while (temp != NULL)
        {
            printf("%s\n", temp->name);
            temp = temp->next;
        }
    }
    else
    {
        while (temp != NULL)
        {
            printf("%s\n", temp->name);
            temp = temp->last;
        }
    }
}