struct Date{
    int month;
    int day;
    int year;
};
struct Person{
    char name[20];
    char sex;
    struct Date birthday;
    unsigned long num;        /*身份证号码*/
};
#include <stdio.h>
int main(void)
{
    struct Person p1={"wanglin",'M',12,15,1974,111000222};
    struct Person p2;
    p2.name[6]="wenya";    /*这里如果我需要单独赋值，应该怎样呢？我这里是错误的*/
    p2.sex='W';
    p2.num=111000223;
    p2.birthday=p1.birthday;
    printf("Person1: %s, %c, %d-%d-%d, %lu\n",p1.name,p1.sex,p1.birthday.month,p1.birthday.day,p1.birthday.year,p1.num);
    printf("Person2: %s, %c, %d-%d-%d ,%lu\n",p2.name,p2.sex,p2.birthday.month,p2.birthday.day,p2.birthday.year,p2.num);
    return 0;
}

问题在注释里，谢谢了～