[Missed Class] EGCO112 - Construct/Destruct

/* Construct Destruct */

#include <iostream>

using namespace std;
class MU_person
{
public:
    MU_person()
    {
        cout << "MU_person constructor" << endl;
    }
    ~ MU_person ()
    {
        cout << "MU_person destructor" << endl;
    }
};
class student: public MU_person
{
public:
    student()
    {
        cout << "student constructor" << endl;
    }
    ~student()
    {
        cout << "student destructor" << endl;
    }
};
int main(void)
{
    cout << "Program starts." << endl;
    //MU_person d;
    student d;
    cout << "Program ends." << endl;
    return 0;
}




/* Construct Destruct 2 */

#include <iostream>

using namespace std;

class MU_person
{
protected:
    long id;
public:
    MU_person(long=10);
};
MU_person::MU_person(long x)
{
    id=x;
    cout<< "MU person constructor " << id <<endl;
}

class student:public MU_person
{
private:
    double gpa;
public:
    student(long=20 ,double=2.5);
    void display();
};
void student::display()
{
    cout<< "id" << id <<endl;
    cout<< "gpa" << gpa <<endl;
}
student::student(long x,double g):MU_person(x)
{
    gpa=g;
    cout<< "MU student constructor " << x << " " << g <<endl;
}

int main()
{
    student m1(1111,2),m2(112),m3;
    m1.display();
    return 0;
}