动态链表，输出的为什么不是头两个数？

Question

#include "stdio.h"#include <malloc.h>struct weapon{ int price; int atk; struct weapon * next;};//缺；struct weapon * create(){ int a=0; struct weapon *p1,*p2,*head; p1=p2=(struct weapon *)malloc(sizeof(struct weapon)); scanf("%d%d",&p1->price,&p2->atk); head=NULL; while(p1->price!=0) { a++; if(a==1) head=p1; else  p2->next=p1;    p2=p1; p1=(struct weapon *)malloc(sizeof(struct weapon)); scanf("%d%d",&p1->price,&p2->atk); } p2->next=NULL; return (head);} void main(){    struct weapon * p;    p=create();    printf("%d,%d",p->price,p->atk);//名打错}