Базовый класс Человек и производный класс Студент

#include <iostream>
 
using namespace std;
 
class Human {
private:
    string Surname;
    int Age;
    string Pol;
public:
void input_info () {
    cout << "Enter Surname: " << endl;
    cin >> Surname;
    cout << "Enter Age: " << endl;
    cin >> Age;
    cout << "Enter Pol: " << endl;
    cin >> Pol;
}
 
void print_info () {
cout << Surname << endl;
cout << Age<< endl;
cout << Pol << endl;
}
 
};
 
class Student : public Human {
    private:
        int Kurs, Number, Medium_mark;
    public:
        Student_out_info() : print_info() {
 
        } 
        void Excellent () {
            if (Medium_mark == 5) {
 
            }
        }
    };
 
int main(int argc, char const *argv[])
{
Human objHuman;
objHuman.input_info();
objHuman.print_info();
    return 0;
}

#include <iostream>
 
using namespace std;
 
class Human {
private:
    string Surname;
    int Age;
    string Pol;
public:
Human () {
    Surname = "Belyavtcev";
    Age = 19;
    Pol = "Man";
}
 
Human (string date_Surname, int date_Age, string date_Pol) {
Surname = date_Surname;
Age = date_Age;
Pol = date_Pol;
 
print_info ();
}
 
void input_info () {
    cout << endl;
    cout << "Enter Surname: " << endl;
    cin >> Surname;
    cout << "Enter Age: " << endl;
    cin >> Age;
    cout << "Enter Pol: " << endl;
    cin >> Pol;
}
 
void print_info () {
    cout << endl;
cout << Surname << ", " << Age << ", " << Pol << endl;
}
 
};
 
class Student : public Human {
    private:
        int Kurs, Number, Medium_mark;
    public:
        /*Student_out_info() : print_info() {
 
        } */
        void Excellent () {
            if (Medium_mark == 5) {
 
            }
        }
    };
 
int main(int argc, char const *argv[])
{
 
Human Students("Belyavtcev", 19, "Man");
Students.input_info();
Students.print_info ();
 
    return 0;
}