2) Abiturient

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

struct Mmarks{
    int algebra;
    int geometria;
    int chemistry;
};

class Abiturient{
public:
    // Конструктор
    Abiturient(string FirstName, string LastName, string MiddleName, string Adress, Mmarks Marks){
        set_first_name(FirstName);
        set_last_name(LastName);
        set_middle_name(MiddleName);
        set_adress(Adress);
        set_marks(Marks);
    }

    // Сеттеры
    void set_first_name(string first_name){
        FirstName = first_name;
    }
    void set_last_name(string last_name){
        LastName = last_name;
    }
    void set_middle_name(string middle_name){
        MiddleName = middle_name;
    }
    void set_adress(string adress){
        Adress = adress ;
    }
    void set_marks(Mmarks marks){
        Marks = marks ;
    }

    // Геттеры
    string get_first_name(){
        return  FirstName;
    }
    string get_last_name(){
        return LastName;
    }
    string get_middle_name(){
        return MiddleName;
    }
    string get_adress(){
        return Adress;
    }
    Mmarks get_marks(){
        return  Marks;
    }

    // other
    void print_all_data(){
        cout << FirstName << " " << LastName << " " << MiddleName << " "
             << " " << Adress<< " marks : " << Marks.algebra<<" " << Marks.chemistry<<" " << Marks.geometria<<  endl;
    }

private:
    string  FirstName,
            LastName,
            MiddleName,
            Adress;
    Mmarks  Marks;
};


void search_bad(vector <Abiturient> Abiturients){
    cout << "\n\nWith bad marks  " << endl;
    int size = Abiturients.size();
    for (int i = 0;i<size; i++){
        Mmarks current_marks  = Abiturients[i].get_marks();
        if((current_marks.geometria < 4) || (current_marks.chemistry < 4) || (current_marks.algebra < 4)) {
            Abiturients[i].print_all_data();
        }
    }
}

void search_summ_less(vector <Abiturient> Abiturients, int summ){
    cout << "\n\nSumm less then  " << summ << endl;
    int size = Abiturients.size();
    for (int i = 0;i<size; i++){
        Mmarks current_marks  = Abiturients[i].get_marks();
        if((current_marks.geometria + current_marks.chemistry + current_marks.geometria) < summ) {
            Abiturients[i].print_all_data();
        }
    }
}


int main() {
    vector <Abiturient> Abiturients;
    Abiturients.push_back(Abiturient("Ivan","Ivanov","Ivanovich","Kropotkina 10",{5,5,5}));
    Abiturients.push_back(Abiturient("Petr","Petrov","Petrovich","Kropotkina 20",{4,4,4}));
    Abiturients.push_back(Abiturient("Andrey","Pushkin","Ivanovich","Kropotkina 21",{3,5,4}));
    Abiturients.push_back(Abiturient("Oleg","Kalinin","Vladimirovich","Titova 23",{5,4,5}));
    Abiturients.push_back(Abiturient("Regina","Makarova","Daniilovna","Titova 23",{3,5,5}));
    Abiturients.push_back(Abiturient("Evgeny","Abramov","Pavlovich","Dekabristov 7",{3,5,3}));
    Abiturients.push_back(Abiturient("Vladimir","Maksimov","Andreevich","Lenina 5",{3,3,3}));
    Abiturients.push_back(Abiturient("Oksna","Muhina","Artemovna","Bogatkova 63",{5,5,5}));

    search_bad(Abiturients);
    search_summ_less(Abiturients, 12);

    return 0;
}