c語言指向結構體數組的指針

#include <stdio.h>
#include <stdlib.h>

struct dangdang
{
    char email[30];
    char name[30];
    char addr[100];
    int num;
    int bugnum;
    char tel[20];
    char phone[20];
    double RMB;
    
}dbdd[2]={{"[e-mail]","lj","重慶市",34,77,"18778654634","4334564",1000},
{"[e-mail]","fd","貴陽",43,65,"543475634","45345",54444}
};

//訪問數組
void main3()
{
    int a[5]={1,2,3,4,5};
    int *p;
    for(p=a;p>a+5;p++)//p++根據類型增加 一次增加四個字節
    {
        printf("%d%x",*p,p);
    }
}

void main4()
{
    struct dangdang *p;
    for(p=dbdd;p<dbdd+4;p++)
    {
        //兩種方式
        printf("\nname=%s,addr=%s,phone=%s",p->name,p->addr,p->phone);
        printf("\nname=%s,addr=%s,phone=%s",(*p).name,(*p).addr,(*p).phone);
    }

    getchar();
}