创建一个结构体ST，成员有num(学号)，name（姓名），score（成绩），birthday（出生日期），出生日期是一个名为date的结构体类型，初始化第1个人员的数据信息并赋予变量st1，再把此人信息赋给另一个变量st2，输出两个变量st1及st2的值。

#include <iostream>
#include <string>
using namespace std;

struct date {
    int year;
    int month;
    int day;
};

struct ST {
    int num;
    string name;
    float score;
    date birthday;
};

int main() {
    ST st1 = { 1001, "张三", 89.5, {2000, 5, 20} };
    ST st2 = st1;

    cout << "st1.num: " << st1.num << endl;
    cout << "st1.name: " << st1.name << endl;
    cout << "st1.score: " << st1.score << endl;
    cout << "st1.birthday: " << st1.birthday.year << "-" << st1.birthday.month << "-" << st1.birthday.day << endl;

    cout << "st2.num: " << st2.num << endl;
    cout << "st2.name: " << st2.name << endl;
    cout << "st2.score: " << st2.score << endl;
    cout << "st2.birthday: " << st2.birthday.year << "-" << st2.birthday.month << "-" << st2.birthday.day << endl;

    return 0;
}

输出结果:

st1.num: 1001
st1.name: 张三
st1.score: 89.5
st1.birthday: 2000-5-20
st2.num: 1001
st2.name: 张三
st2.score: 89.5
st2.birthday: 2000-5-20