#include<stdio.h>struct st;{int x; int *y;}*p;int dt[4]={10,20,30,40};struct st aa[4]={50,&dt[0],60,&dt[1],70,&dt[2],80,&dt[3]};void main(){p=aa;printf("%d",++p->x);printf("%d",(++p)->x;);printf("%d",++(*p->y));}解释下,谢咯