三种形式分别为：

结构体变量名.成员名

指针变量名->成员名

(*指针变量名).成员名（注意：*不能省略因.的结合性大于*)

#include <iostream>

using namespace std;

struct student1
{
    int Code;
    char Name[20];
    char Sex;
    int Age;
};  //只定义了其的名字但未对其进行初始化


struct student1 Stu[2]={
  {1,"zhangsan",'M',21},{2,"lisi",'M',22}};
int main()
{
    struct student1 *pstu;

    cout<<"The Second Form Refer To Structure Variables: "<<endl;
    for(pstu=Stu;pstu<Stu+2;pstu++)
        cout<<pstu->Code<<"\t"<<pstu->Name<<"\t"<<pstu->Sex<<"\t"<<pstu->Age<<endl;
    cout<<"The First Form Refer To Structure Variables:"<<endl;
    for(int i=0;i<2;i++)
        cout<<Stu[i].Code<<"\t"<<Stu[i].Name<<'\t'<<Stu[i].Sex<<'\t'<<Stu[i].Age<<endl;
    cout<<"The Third Form Refer To Sturucture Variables:"<<endl;
    for(pstu=Stu;pstu<Stu+2;pstu++)
        cout<<(*pstu).Code<<"\t"<<(*pstu).Name<<"\t"<<(*pstu).Sex<<"\t"<<(*pstu).Age<<endl;
    return 0;
}