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

typedef struct list {
    int data;
    struct list *next;
} Llist, *NewList;

// 单链表的声明函数系列
void list(void);                // 单链表的主函数;
void createlist(NewList);        // 加长链表的长度;
void printlist(NewList);        // 输出链表的数据;

// 源代码开始
main()
{
    list();
}

// 单链表的主函数
void list (void)
{
    NewList head;
    head->data = 12;
    head->next = NULL;
    createlist(head);
    printlist(head);
}

// 延长单链表的长度并存储数据
void createlist(NewList head)
{
    int data;
    NewList p;            
    NewList nextlist;        // 作为交换的中间量
    int n = 1;
    while(1)
    {
        if(n == 2)            // 作为链表长度的限定
            break;
        printf("Enter new data: \n");
        scanf("%d", &data);
        nextlist = malloc(sizeof(NewList));  // 分配资源
        nextlist->data = data;
        nextlist->next = NULL;
        if(head->next == NULL)
        {
            head->next = nextlist;
            p = nextlist;
        }
        else
        {
            p->next = nextlist;
            p = nextlist;
        }
        n++;
//        free(nextlist);
    }
}

void printlist(NewList head)
{
    printf("Enter the list");
    while(head->next != NULL)
    {
        printf("%d",(head++)->data);
    }
}

在学习的时候都要坦诚一点....