c语言中的结构体变量

#include 

#include

//结构体变量的使用

/*结构体变量对成员的调用方式：

 * 结构体变量.结构体成员

 * 注意：这里说的结构体变量说的是普通结构体变量

 *

 */

    struct stu{

     int id;

     char name[32];

     char sex;

     char age;

    }zhangsan,lisi={1001,"lisi",'A',20};

    //typedef

    typedef struct {

     int id;

     char name[32];

     char sex;

     char age;

    }MSG;

    void test(){

        struct stu wangwu;

        struct stu zhaoliu={1001,"zhoaliu",'B',20};

        MSG msg1,msg2={1001,"lisi",'A',20};

        zhangsan.id=1001;

        strcpy(zhangsan.name,"zhangsan");

        zhangsan.sex ='B';

        zhangsan.age=18;

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

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

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

          printf("%d-%s-%c-%d\n",msg2.id,msg2.name,msg2.sex,msg2.age);

    }

//在结构体中嵌套结构体

typedef struct{

//    里面的变量是没有空间的，我们只是定义了类型，不能赋值的

    int year;

    int month;

    int day;

}BD;

typedef  struct{

    int id;

    char name[32];

    BD birthday;

}STU;

void test1(){

    STU xiaoming;

    xiaoming.id=1001;

    strcpy(xiaoming.name,"xiaoming");

//    如果结构体中嵌套结构体，赋值时找到最内层的成员再进行赋值

    xiaoming.birthday.year=2002;

    xiaoming.birthday.month=12;

    xiaoming.birthday.day=10;

   printf("%d-%s-%d:%d:%d\n",xiaoming.id,xiaoming.name,xiaoming.birthday.year,xiaoming.birthday.month,xiaoming.birthday.day);

}

int main()

{

    test();

    test1();

    return 0;

}