结构体的题目,不知所云，大虾帮忙啊！

struct st {int x;int *y;} *p; int dt[4]={10,20,30,40}; struct st aa[4]={50,&dt[0],60,&dt[0],60,&dt[0],60,&dt[0],}; main() { p=aa; printf("%d\n",++(p->x)); }