C++ 学生在册人员类 Person 设计与实现

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

class Date {
public:
    Date(int y, int m, int d) : year(y), month(m), day(d) {}
    void display() const {
        cout << year << '-' << month << '-' << day << endl;
    }
private:
    int year, month, day;
};

class Person {
public:
    Person() : idPerson(""), name(""), sex(""), birthday(nullptr), homeAddress("") {}
    Person(string id, string n, string s, Date* b, string h) : idPerson(id), name(n), sex(s), birthday(b), homeAddress(h) {}
    Person(const Person& p) : idPerson(p.idPerson), name(p.name), sex(p.sex), birthday(new Date(*p.birthday)), homeAddress(p.homeAddress) {}
    ~Person() {
        delete birthday;
    }
    void input() {
        cout << "请输入身份证号：";
        cin >> idPerson;
        cout << "请输入姓名：";
        cin >> name;
        cout << "请输入性别：";
        cin >> sex;
        cout << "请输入生日(年月日)：";
        int year, month, day;
        cin >> year >> month >> day;
        birthday = new Date(year, month, day);
        cout << "请输入家庭住址：";
        cin >> homeAddress;
    }
    void display() const {
        cout << "身份证号：" << idPerson << endl;
        cout << "姓名：" << name << endl;
        cout << "性别：" << sex << endl;
        cout << "生日：";
        birthday->display();
        cout << "家庭住址：" << homeAddress << endl;
    }
private:
    string idPerson;    //身份证号
    string name;        //姓名
    string sex;         //性别
    Date* birthday;     //生日
    string homeAddress; //家庭住址
};

int main() {
    Person p1;
    p1.input();
    p1.display();

    Person p2 = p1;
    p2.display();

    return 0;
}