# include <stdio.h>
# include <stdio.h>
# include <stdlib.h>
typedef    struct Node {
    int data;//数据域
    struct Node * pNEXT;//指针域
}NODE, *PNODE;

PNODE create_list(void);
void  traverse_list (PNODE pHead);

int main (void)
{
    PNODE pHead;
 pHead = NULL;
    pHead = create_list();//创建一个非循环单 链表
    traverse_list (pHead);
     
    return 0;
 }
PNODE  create_list(void)
{
    int i;
    int len;
    int val;
    PNODE pHead = (PNODE)malloc(sizeof(NODE)) ;
   
    if (NULL == pHead)
    {
        printf("分配失败，程序终止！\n");
        exit (-1);
      }  
      
    PNODE pToli = pHead ;
    pToli->pNEXT = NULL;
    pHead->pNEXT = pToli;
    printf ("请输入你要分配的节点个数： len = ");
    scanf ("%d",&len);
   
    for (i = 0; i < len; ++i)
    {
        printf("请输入第%d个节点的值",i+1);
        scanf("%d",val);
        
    PNODE pNew = (PNODE)malloc(sizeof(NODE)) ;
        if (NULL == pNew)
    {
        printf("分配失败，程序终止！\n");
        exit (-1);
      }  
        pNew->data = val;
        pToli->pNEXT = pNew;
        pNew->pNEXT = NULL;
        pToli = pNew;
    }
    return pHead;
}
void  traverse_list (PNODE pHead)
{
    PNODE p = pHead->pNEXT;
    while ( NULL != p)
    {
        printf ("%d ", p->data);
        p = p->pNEXT;
        
    }
    printf("\n");
   
}



为什么只能输入一个节点的值     第二个就不行了      

除了 scanf("%d",val);有点问题，这段程序可以正常运行的吧？

输入第一个节点的值过后    就崩溃了   我使用别人的源代码就没有问题   不知道错在哪里

可以试着调试一下，看看是在哪里出错的

# include <stdio.h>
# include <stdio.h>
# include <stdlib.h>
typedef    struct Node {
    int data;
    struct Node * pNEXT;
}NODE, *PNODE;

PNODE create_list(void);
void  traverse_list (PNODE pHead);

int main (void)
{
    PNODE pHead; 

 pHead = NULL;
    pHead = create_list(); 
    traverse_list (pHead);
     
    return 0;

 } 
PNODE  create_list(void)
{
    int i;
    int len;
    int val;
    PNODE pHead = (PNODE)malloc(sizeof(NODE)) ;
    
    if (NULL == pHead)
    {
        printf("分配失败，程序终止！\n");
        exit (-1);
      }  
      
    PNODE pToli = pHead ;
    pToli->pNEXT = NULL;
    pHead->pNEXT = pToli;
    printf ("请输入你要分配的节点个数： len = ");
    scanf ("%d",&len);
    
    for (i = 0; i < len; ++i)
    {
        printf("请输入第%d个节点的值",i+1);
        scanf("%d",&val);//这里出错了 
        
    PNODE pNew = (PNODE)malloc(sizeof(NODE)) ;
        if (NULL == pNew)
    {
        printf("分配失败，程序终止！\n");
        exit (-1);
      }  
        pNew->data = val;
        pToli->pNEXT = pNew;
        pNew->pNEXT = NULL;
        pToli = pNew;
    }
    return pHead;
}
void  traverse_list (PNODE pHead)
{
    PNODE p = pHead->pNEXT;
    while ( NULL != p)
    {
        printf ("%d ", p->data);
        p = p->pNEXT;
        
    }
    printf("\n");
    
}

好的