C语言示例讲解结构体的声明与初始化方法

struct tag { 
    member-list；
    member-list；
    member-list；  
    ...
} variable-list;

typedef struct
{
    int a;
    char b;
    double c; 
} Simple_t;
Simple_t u1, u2[20], *u3;

//此结构体的声明包含了指向自己类型的指针
struct node
{
    char string[100];
    struct NODE *next_node;
};

struct B;    //对结构体B进行不完整声明
//结构体A中包含指向结构体B的指针
struct A
{
    struct B *partner;
    //other members;
};
//结构体B中包含指向结构体A的指针，在A声明完后，B也随之进行声明
struct B
{
    struct A *partner;
    //other members;
};

struct Student{         //声明结构体
    char name[20];      //姓名
    int num;            //学号
    float score;        //成绩
};

struct Student student1；

struct Student{         //声明结构体
    char name[20];      //姓名
    int num;            //学号
    float score;        //成绩
}student1;

struct Books
{
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
} book = {"C 语言", "RUNOOB", "编程语言", 123456};

# include <stdio.h>
struct AGE
{
    int year;
    int month;
    int day;
};
struct STUDENT
{
    char name[20];
    int num;
    struct AGE birthday;
    float score;
};
int main(void)
{
    struct STUDENT student1 = {"小明", 1207041, {1989, 3, 29}, 100};
    return 0;
}

 struct STUDENT student1; 
 student1.num = 1207041;

struct book gift = 
{ 
     .value = 25.99,
     .author = "James Broadfool",
     .title = "Rue for the Toad"
};