C language system learning 7 structure

structure

A structure is a commonly used code in the coding process, which is convenient for collecting different types of member variables

declaration of the structure

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

e.g. describe a person

typedef struct pepole
{
    
    
	char name[20]//名字
	int age；//年龄
	char sex[5];//性别
	char id[20];//身份证号
}Stu；

Types of structure members Structure
members can be scalars, arrays, pointers, or even other structures
Definition and initialization of structure variables

struct point
{
    
    
	int x;
	int y;
}p1;//声明类型的同时赋值
struct point p2;//定义结构体变量p2

struct Stu//类型声明
{
    
    
	char name[15];//名字
	int age；//年龄
}；
struct Stu s={
    
    "doudou",20};//初始化

struct Node
{
    
    
	int data;
	struct point p;
	struct Node* next;
}n1={
    
    10,{
    
    4,5},NULL};  //结构体嵌套初始化

struct Node n2={
    
    20,{
    
    5,6},NULL};

struct Node n2={
    
    20,{
    
    5,6},NULL}; //结构体嵌套初始化

Access to structure members
Struct variable access members are accessed through the dot operator (.). The dot operator takes two operands

struct Stu
{
    
    
	char name[20];
	int age;
};

void print(struct Stu*ps)
{
    
    
printf("name=% age=%d\n",(*ps).name,(*ps).age);//使用结构体的指针访问指向对象的成员
printf("name=% age=%d\n",ps->name,ps->age);
}

int main()
{
    
    
struct Stu s={
    
    "zhangsan",20};
print(&s);
return 0;
}