写一个科目类，包含科目名称，科目分数2个数据成员，一个衡量科目是否及格的成员函数，用其构造函数为科目对象提供初始值，该构造函数无参数，在构造函数里面读入具体的值。 写一个学生类，含学号，姓名2个数据成员，以及一个科目类对象指针成员（指向三门科目对象组成的对象数组），在学生类的构造函数中为学生的学号和姓名提供初始值，并为科目对象指针申请空间，在学生类中用成员函数展示其三门课成绩并说明是否及格，请编写程序。

以下是代码实现：

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

class Subject {
private:
    string name;
    int score;
public:
    Subject() {}
    Subject(string n, int s) : name(n), score(s) {}
    bool isPass() {
        return score >= 60;
    }
    void display() {
        cout << name << ": " << score << " (" << (isPass() ? "Pass" : "Fail") << ")" << endl;
    }
};

class Student {
private:
    string id;
    string name;
    Subject* subjects;
public:
    Student(string i, string n) : id(i), name(n) {
        subjects = new Subject[3];
        cout << "Enter scores for " << name << " (ID: " << id << "):" << endl;
        for (int i = 0; i < 3; i++) {
            string name;
            int score;
            cout << "Subject " << i+1 << " name: ";
            cin >> name;
            cout << "Subject " << i+1 << " score: ";
            cin >> score;
            subjects[i] = Subject(name, score);
        }
    }
    ~Student() {
        delete[] subjects;
    }
    void display() {
        cout << "Name: " << name << endl;
        cout << "ID: " << id << endl;
        for (int i = 0; i < 3; i++) {
            subjects[i].display();
        }
    }
};

int main() {
    Student s("001", "John");
    s.display();
    return 0;
}

输出结果：

Enter scores for John (ID: 001):
Subject 1 name: Math
Subject 1 score: 80
Subject 2 name: English
Subject 2 score: 70
Subject 3 name: Science
Subject 3 score: 55
Name: John
ID: 001
Math: 80 (Pass)
English: 70 (Pass)
Science: 55 (Fail)