结构体指针和数组理解

（1）第一个

# include<iostream>
using namespace std;
struct student
{
    int num;
    char name[12];
    char sex;
    int age;
}//stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
*st;
struct student stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
int main()
{
    //struct student *st;

    for(st = stu; st < stu+3; st++)
    {
        cout<<(*st).num<<" "<<(*st).name<<" "<<(*st).sex<<" "<<(*st).age<<endl;

    }
      cout<<"------------------------------------------------"<<endl;
    for(st = stu; st < stu+3; st++)
    {
        cout<<st->num<<" "<<st->name<<" "<<st->sex<<" "<<st->age<<endl;
    }

}

（2）第二个

# include<iostream>
using namespace std;
struct student
{
    int num;
    char name[12];
    char sex;
    int age;
}//stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
;
struct student stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
int main()
{
    struct student *st;

    for(st = stu; st < stu+3; st++)
    {
        cout<<(*st).num<<" "<<(*st).name<<" "<<(*st).sex<<" "<<(*st).age<<endl;

    }
      cout<<"------------------------------------------------"<<endl;
    for(st = stu; st < stu+3; st++)
    {
        cout<<st->num<<" "<<st->name<<" "<<st->sex<<" "<<st->age<<endl;
    }

}

（3）第三个

# include<iostream>
using namespace std;
struct student
{
    int num;
    char name[12];
    char sex;
    int age;
}stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};

//struct student stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
int main()
{
    struct student *st;

    for(st = stu; st < stu+3; st++)
    {
        cout<<(*st).num<<" "<<(*st).name<<" "<<(*st).sex<<" "<<(*st).age<<endl;

    }
      cout<<"------------------------------------------------"<<endl;
    for(st = stu; st < stu+3; st++)
    {
        cout<<st->num<<" "<<st->name<<" "<<st->sex<<" "<<st->age<<endl;
    }

}

（4）第四个（注意看typedef）

# include<iostream>
using namespace std;
typedef struct student
{
    int num;
    char name[12];
    char sex;
    int age;
}//stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
stt;
 stt stu[3] = {{1,"miao",'M',19},{2,"chuang",'F',23},{3,"hello",'M',24}};
int main()
{
    stt *st;

    for(st = stu; st < stu+3; st++)
    {
        cout<<(*st).num<<" "<<(*st).name<<" "<<(*st).sex<<" "<<(*st).age<<endl;

    }
      cout<<"------------------------------------------------"<<endl;
    for(st = stu; st < stu+3; st++)
    {
        cout<<st->num<<" "<<st->name<<" "<<st->sex<<" "<<st->age<<endl;
    }

}