大家好，自己写了个链表创建和打印程序，编译和运行都正常，就是遍历的时候只输出最后一个节点，请大家帮我指正，谢谢大家，下面附上源代码：

/*创建链表，并遍历链表
   时间：2012.02.08
   作者：david
*/
#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>

    typedef struct Node{
        int data;
        struct Node *next;
        }Node,*pNode;
        
        //函数声明
          pNode create();//创建链表
          void  travel(pNode phead);//遍历链表
        
        int  main(void){
             pNode phead;
             phead=create();
             travel(phead);
             return 0;
             }
           pNode create(){//输入链表长度和数据构造链表
                    int i,len,val;
                    pNode phead=(pNode)malloc(sizeof(Node));  
                    if(phead==NULL){
                       printf("系统分配失败，程序退出");
                       exit(-1);
                         }   
                    pNode ptail=phead;
                    printf("请输入链表的长度\n");
                    scanf("%d",&len);
                    for(i=0;i<len;i++){
                          printf("请输入链表的第%d的数据\n",i+1);
                          scanf("%d",&val);
                          pNode pnew=(pNode)malloc(sizeof(Node));
                          if(pnew==NULL){
                            printf("系统分配失败，程序退出");
                             exit(-1);
                         }   
                         pnew->data=val;
                         phead->next=pnew;
                         pnew->next=NULL;
                         ptail=pnew;
                          }
                          return phead;
                          }
         void  travel(pNode phead){//输入头指针，如果指针的值不为空就遍历
               
               pNode p=phead->next;
               while(p!=NULL){
                       printf("%d",p->data);
                       p=p->next;
                       }
                     }  

{   
    pnew->data=val;
    phead->next=pnew;  //貌似这里有问题，应该是ptail->next = pnew吧;
    pnew->next=NULL;
    ptail=pnew;
                     }

谢谢，运行通过了，谢谢！