C语言结构体通过 scanf初始化

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# include <stdio.h>
struct AGE
{
    int year;
    int month;
    int day;
};
struct STUDENT
{
    char name[20];
    int num;
    struct AGE birthday;
    float score;
};  //分号不能省
int main(void)
{
    struct STUDENT student1;  /*用struct STUDENT结构体类型定义结构体变量student1*/
    printf("请输入姓名：");
    scanf("%s", student1.name);  //不能写成&student1
    printf("请输入学号：");
    scanf("%d", &student1.num);
    printf("请输入生日：");
    scanf("%d", &student1.birthday.year);
    scanf("%d", &student1.birthday.month);
    scanf("%d", &student1.birthday.day);
    printf("请输入成绩：");
    scanf("%f", &student1.score);
    printf("name: %s\n", student1.name);  //不能写成&student1
    printf("num: %d\n", student1.num);
    printf("birthday: %d-%d-%d\n", student1.birthday.year, student1.birthday.month, student1.birthday.day);
    printf("score: %.1f\n", student1.score);
    return 0;
}

请输入姓名：lg
请输入学号：08300734
请输入生日：1988
05
03
请输入成绩：99
name: lg
num: 8300734
birthday: 1988-5-3
score: 99.0