程序代码：

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

typedef struct students{
        int s;
        struct students *n;
}stu;

typedef struct _list{
        struct students *head;
}List;

int add(List *ls,int number)
{
        stu *p,*l;
        p=(stu*)malloc(sizeof(stu));
        p->n=NULL;
        p->s=number;
        l=ls->head;
        if(l)
        {
                if(l->n)
                {
                        l=l->n;
                }
                l->n=p;
        }else{
                ls->head=p;
        }

}

int pin(List *ls)
{
        stu *head;
        head=ls->head;
        while(head)
        {
                printf("%d\n",head->s);
                head=head->n;
        }
}

int main()
{
        List *ls;
        ls->head=NULL;;
        int number=1;
        while(number!=0)
        {
                scanf("%d",&number);
                add(ls,number);
        }
        pin(ls);
        return 0;
}
~           

程序代码：

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

typedef struct students{
        int s;
        struct students *n;
}stu;

typedef struct _list{
        struct students *head;
}List;

int add(List *ls,int number)
{
        stu *p,*l;
        p=(stu*)malloc(sizeof(stu));
        
        if(ls == NULL) {
           ls = (List*)malloc(sizeof(List));
           ls->head = NULL;
        }
       
        p->n=NULL;
        p->s=number;
        l=ls->head;
       
        if(l)
        {
                while(l)
                {
                        l=l->n;
                }
                l->n=p;
        }else{
                ls->head=p;
        }
        
}

int pin(List *ls)
{
        stu *head;
        head=ls->head;
        while(head)
        {
                printf("%d\n",head->s);
                head=head->n;
        }
}

int main()
{
        List *ls = NULL;
        /*ls->head=NULL;;*/
        int number=1;
        while(number!=0)
        {
                scanf("%d",&number);
                add(ls,number);
        }
        pin(ls);
        return 0;
}

[此贴子已经被作者于2016-5-11 09:41编辑过]

程序代码：

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

typedef struct students {
    int s;
    struct students *n;
}stu;

typedef struct _list {
    struct students *head;
}List;

int add(List **ls, int number)
{
    stu *p, *l;
    p = (stu*)malloc(sizeof(stu));

    if (*ls == NULL) {
        *ls = (List*)malloc(sizeof(List));
        (*ls)->head = NULL;
    }

    p->n = NULL;
    p->s = number;
    l = (*ls)->head;

    if (l)
    {
        while (l->n)
        {
            l = l->n;
        }
        l->n = p;
    }
    else {
        (*ls)->head = p;
    }

}

int pin(List *ls)
{
    stu *head;
    head = ls->head;
    while (head)
    {
        printf("%d\n", head->s);
        head = head->n;
    }
}

int main()
{
    List *ls = NULL;
    /*ls->head=NULL;;*/
    int number = 1;
    while (number != 0)
    {
        scanf("%d", &number);
        add(&ls, number);//输入地址才能被修改
    }
    pin(ls);
    return 0;
}