c++学生类，继承，构造

学生类，数据成员包括学号（公有）、姓名（保护）、年龄（私有）、学生数（静态）。学生数用来统计构造出来的学生对象数量
课代表类，继承自学生类，数据包括负责课程编号（公有）、课程评分（公有）
要求使用构造初始化符表“：”的形式进行构造，每个类又相关数据的输出显示函数
在主函数中构造对象并输出显示相关数据

#include<iostream>
using namespace std;


//定义学生类
class Student {
public:
    Student(char* n, int i, int a) {
        char *p = new char[strlen(n) + 1];
        name = p;
        strcpy_s(name, strlen(n) + 1, n);
        total_num++;
        id = i;
        age = a;
    }
    //获取各个成员变量
    static int GetTotal() { return total_num; }
    char* GetName() { return name; }
    int GetAge() { return age; }
    int GetId() { return id; }
    //显示学生信息
    void Display() {
        cout << "Name: " << name << endl;
        cout << "Id  : " << id << endl;
        cout << "Age : " << age << endl << endl;
    }
    int id;
protected:
    char *name;
private:
    static int total_num;
    int age;
};

//初始化静态成员变量
int Student::total_num = 0;


//定义课代表类
class Lesson_rep :public Student {
public:
    Lesson_rep(char* n, int i, int a, int l, double s) :Student(n, i, a) {
        lesson_num = l;
        score = s;
    }
    int lesson_num;
    double score;
    //显示课代表信息
    void Display() {
        cout << "Name: " << GetName() << endl;
        cout << "Id  : " << GetId() << endl;
        cout << "Age : " << GetAge() << endl;
        cout << "Lesson Number: " << lesson_num << endl;
        cout << "Lesson Score : " << score << endl << endl;
    }
};

int main() {
    Student stu1("Mike", 112268, 19);
    Student stu2("Eve", 113980, 18);
    Student stu3("Michael", 127923, 17);
    Lesson_rep stu4("Jack", 118888, 20, 666666, 87.62);
    cout << "Information about Michael:" << endl;
    stu3.Display();
    
    cout << "Information about Jack:" << endl;
    stu4.Display();

    cout << "Total Number of Students: " << Student::GetTotal() << endl;

}

运行结果：

Information about Michael:
Name: Michael
Id  : 127923
Age : 17

Information about Jack:
Name: Jack
Id  : 118888
Age : 20
Lesson Number: 666666
Lesson Score : 87.62

Total Number of Students: 4
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