【Structure Pointer】

The structure pointer is the address of the structure, and the structure variable is stored in the memory, and also has the starting address.
Define a variable to store this address, then this variable is a structure pointer variable.

The definition method of the structure pointer variable:

struct 结构体类型名 * 结构体指针变量名;

References to members of structure pointer variables

(*结构体指针变量名).成员
结构体指针变量名‐>成员

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

struct stu{
    
    
    int id;
    char name[32];
    char sex;
    int age;
};

int main(int argc, char *argv[])
{
    
    
    //定义一个结构体指针变量
    struct stu *s;

    //在堆区开辟结构体空间并将其地址保存在结构体指针变量中
    s = (struct stu *)malloc(sizeof(struct stu));

    s->id = 1001;
    strcpy(s->name, "Lila");
    s->sex = 'F';
    s->age = 30;

    printf("%d - %s - %c - %d\n", s->id, s->name, s->sex, s->age);

    return 0;
}

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