结构体

struct student {
    string name;
    int age;
    int score;
};

创建结构体变量

1.

struct student a;
    a.name = "张三";
    a.age = 18;
    a.score = 100;
    cout << a.name << "  " << a.age << "  " << a.score << "  " << endl;

2.

struct student a = { "张三",18,100 };
    cout << a.name << "  " << a.age << "  " << a.score << "  " << endl;

3.

struct student {
    string name;
    int age;
    int score;
}a;
int main()
    {
    a.name = "张三";
    a.age = 18;
    a.score = 100;
    cout << a.name << "  " << a.age << "  " << a.score << "  " << endl;
        return 0;
    }

 创建结构体数组顺便给结构体数组中的元素赋值

#include<iostream>
#include<string>
using namespace std;
struct student {
    string name;
    int age;
    int score;
};
int main()
    {
    struct student a[3] = 
    {
        {"张三",18,100},
        {"李四",19,99},
        {"王五",20,98}
    };
    a[0].name = "老六";
    a[1].name = "头七";
    a[2].name = "王八";
    for(int i = 0; i < 3; i++)
    {
        cout << "  " << a[i].name << "  " << a[i].age << "  " << a[i].score << endl;
    }
        return 0;
    }

结构体指针

struct student a = { "张三",18,100 };
    student* p = &a;
    cout << "  " << p->name;

结构体做函数参数

1.值传递

void printstudent(struct student a)
    {
    cout << a.name << "  " << a.age << "  " << a.score << "  " << endl;
    }

int main()
    {
    struct student a = { "张三",18,100 };
    printstudent(a);
        return 0;
    }

2.地址传递

#include<iostream>
#include<string>
using namespace std;
struct student {
    string name;
    int age;
    int score;
};
void printstudent(struct student *p)
    {
    cout << p->name << "  " << p->age << "  " << p->score << "  " << endl;
    }

int main()
    {
    struct student a;
    a.name = "张三";
    a.age = 18;
    a.score = 100;
    struct student* p = &a;
    printstudent(&a);
        return 0;
    }