c语言，链表

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

struct Node{
    struct Node* next;
    int data;
};
typedef struct Node  NODE;
typedef struct Node  LIST;

LIST *creat_link_list(LIST *L, int n)
{
    int i;
    NODE *p = 0;
    L = (NODE*) malloc(sizeof(NODE)); L->next =0;
    for(i = 0; i < n; i++)
    {
        p = (NODE*) malloc(sizeof(NODE));
        printf("input a data to be inserted:");
        scanf("%d", &p->data);

        p->next = L->next;
        L->next = p;
    }
    return L;
}

int delete_node(NODE* p)
{
//     static int s_i =1;
//     printf("delete %d\n", s_i++);
    p->next = 0;
    free(p);
    p = 0;  

    return 0;
}

int delete_link_list(LIST *L)
{
    NODE* pd = L->next;

    while(L->next != 0){
        pd = L->next;
        L->next = L->next->next;
        delete_node(pd);
    }
    delete_node(L);

    return 0;
}

int show_link_list(LIST *L)
{
    NODE* ps = L->next;
    int i = 0;

    while(ps != 0){
        printf("node%d: %d,", ++i , ps->data);
        ps = ps->next;
    };

//     do{    //错误
//         printf("node%d: %d,", ++i , ps->data);
//         ps = ps->next;
//     }while(ps->next != 0);

    return 0;
}
int t2()
{
    NODE *L = 0;
    int n = 3;

    L = creat_link_list( L, n);
    printf("\ncreat_link_list over\n");

    show_link_list(L);
    printf("\nshow_link_list over\n");

    delete_link_list(L);
    printf("\ndelete_link_list over\n");

    return 0;
}
/*
input a data to be inserted:1
input a data to be inserted:2
input a data to be inserted:3

creat_link_list over
node1: 3,node2: 2,node3: 1,
show_link_list over

delete_link_list over
请按任意键继续. . .
*/