p = p->next 改為p = p++為什么運(yùn)行結(jié)果不正確,p += sizeof(a) 這樣也不正確求解

#include?<stdio.h>

struct?weapon?{
????int?price;
????int?atk;
????struct?weapon?*?next;
};


int?main(){
????struct?weapon?a,b,c,*head,*p;
????a.price?=?100;
????a.atk?=?100;
????b.price?=?200;
????b.atk?=?200;
????c.price?=?300;
????c.atk?=?300;
????head?=?&a;
????a.next?=?&b;
????b.next?=?&c;
????c.next?=?NULL;
????p?=?head;
????while(p?!=?NULL){
????????printf("%d,%d\n",p->price,p->atk);
????????p?=?p->next;
????}
}