在结构体中还有结构体如何用指针访问？ - C语言论坛

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在结构体中还有结构体如何用指针访问？

程序代码：

#include <stdio.h>
#include <stdlib.h>
struct date {
    int year;
    int month;
    int day;
};
struct student {
    char name[20];
    char sex[4];
    struct date birthday;
};
void Insert(struct student *,int );
void Display(struct student *,int);
int main(void) {
    struct student stu[20];
    Insert(stu,2);
    Display(stu,2);
    system("pause");
    return 0;
}
void Insert(struct student *stu,int n) {
    struct student *p;
    for(p=stu; p<stu+n; p++) {
        scanf("%s",p->name);
        scanf("%s",p->sex);
        scanf("%d",p->birthday->year);
        scanf("%d",p->birthday->month);
        scanf("%d",p->birthday->day);
    }
}
void Display(struct student *stu,int n) {
    struct student *p;
    for(p=stu; p<stu+n; p++) {
        printf("%s ",p->name);
        printf("%s ",p->sex);
        printf("%d-",p->birthday->year);
        printf("%d-",p->birthday->month);
        printf("%d",p->birthday->day);
        printf("\n");
    }
}

我这样访问是错误的有大神能指导下不

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void Insert(struct student *stu,int n) { struct student *p; for(p=stu; p<stu+n; p++) { scanf("%s",p->name); scanf("%s",p->sex); scanf("%d",&p->birthday.year ); scanf("%d",&p->birthday.month); scanf("%d",&p->birthday.day); } } void Display(struct student *stu,int n) { struct student *p; for(p=stu; p<stu+n; p++) { printf("%s ",p->name); printf("%s ",p->sex); printf("%d-",p->birthday.year); printf("%d-",p->birthday.month); printf("%d",p->birthday.day); printf("\n"); } }