3 класса

#include <iostream>
#include <ctime>
#include <cmath>
#include <cstdlib>
#include <string>
using namespace std;

class NegativeException {
    string exc;

    friend ostream& operator<<(ostream& os, const NegativeException& vi) {
        os << "исключение " << vi.exc;
        return os;
    }
public:

    NegativeException() {
        this->exc = "NegativeException";
    }
};

class InvalidAdress {
    string exc;

    friend ostream& operator<<(ostream& os, const InvalidAdress& vi) {
        os << "исключение " << vi.exc;
        return os;
    }
public:

    InvalidAdress() {
        this->exc = "InvalidAdress";
    }
};

class Human {
protected:
    string name;
    double ves;
    double rost;
    int vozrast;
public:

    Human(string a = "Иван", double b = 84, double r = 162, int v = 21) {
        name = a;
        ves = b;
        rost = r;
        vozrast = v;
    }

    Human(const Human &m) {
        name = m.name;
        vozrast = m.vozrast;
        ves = m.ves;
        rost = m.rost;
    }

    Human& operator=(Human m) {
        name = m.name;
        vozrast = m.vozrast;
        ves = m.ves;
        rost = m.rost;
    }

    void setname(string c) {
        name = c;
    }

    string getname() {
        return name;
    }

    void setves(double c) {
        ves = c;
    }

    double getves() {
        return ves;
    }

    void setrost(double c) {
        rost = c;
    }

    double getrost() {
        return rost;
    }

    void setvozrast(int c) {
        vozrast = c;
    }

    int getvozrast() {
        return vozrast;
    }

    friend ostream& operator<<(ostream& vivod, Human& H) {
        vivod << "name " << H.name << endl << "vozrast " << H.vozrast << endl << "rost " << H.rost << endl << "ves " << H.ves << endl;
        return vivod;
    }

    friend istream& operator>>(istream& vvod, Human& H) {
        cout << "Enter name " << endl;
        vvod >> H.name;
        vvod.ignore();
        cout << "Enter vozrast " << endl;
        vvod >> H.vozrast;
        vvod.ignore();
        cout << "Enter rost " << endl;
        vvod >> H.rost;
        vvod.ignore();
        cout << "Enter ves " << endl;
        vvod >> H.ves;
        cout << endl;
        return vvod;
    }

    double IndMas() {
        double k = ves / pow(rost, 2);
        return k;
    }
};

class Book {
protected:
    string *pred;
    int size;
    int *mark;
public:

    Book(int size = 2) {//Конструктор. size задаёт количество сдаваемых предметов. По умолчанию - 2
        this->size = size;
        pred = new string [size];
        mark = new int [size];
        for (int i = 0; i < size; i++) {
            char a[10];
            //cout<<"1";
            itoa(i, a, 10);
            //cout<<"2";
            string s = "Предмет";
            //cout<<"3";
            s += a;
            // cout<<"4";
            pred[i] = s;
            //cout<<"5";
            //cout<<endl;
        }
        for (int i = 0; i < size; i++) {
            mark[i] = rand() % (5 - 2 + 1) + 2;
        }
    }

    Book(int *mark, string *pred, int size = 2) {
        if (size <= 0)throw NegativeException();
        this->pred = new string [size];
        this->mark = new int [size];
        for (int i = 0; i < size; i++) {
            this->pred[i] = pred[i];
        }
        for (int i = 0; i < size; i++) {
            this->mark[i] = mark[i];
        }
        this->size = size;
    }

    /**
     * <b>Переопределённый оператор =</b><br>
     * @param b присваеваемый Book
     * @return изменённый объект
     */
    Book& operator=(Book b) {
        //if (*this == b)return *this;
        if (b.size != this->size) {
            delete []this->mark;
            delete []this->pred;
            this->size = b.size;
            this->pred = new string [b.size];
            this->mark = new int [b.size];
        }
        this->copy(b.mark, b.pred);
        return *this;
    }

    /**
     * <b>Перенос массива</b>
     * Техническая функция. ВАЖНО: Размер this.v должен совпадать с размером переносимого массива
     * @param v переносимый массив
     */
    void copy(int *v, string *v1) {
        for (int i = 0; i<this->size; i++) {
            this->mark[i] = v[i];
        }
        for (int i = 0; i<this->size; i++) {
            this->pred[i] = v1[i];
        }
    }

    Book(const Book& b) {
        pred = new string[b.size];
        mark = new int[b.size];
        size = b.size;
        for (int i = 0; i < size; i++) {
            this->pred[i] = b.pred[i];
        }
        for (int i = 0; i < size; i++) {
            this->mark[i] = b.mark[i];
        }
    }

    ~Book() {
        delete []pred;
        delete mark;
    }

    void setPred(string s, int i = 0) {
        if (i<this->size) {
            this->pred[i] = s;
        } else cout << "Error";
    }

    void setPred(int m, int i = 0) {
        if (i<this->size && m >= 1 && m <= 5) {
            this->mark[i] = m;
        } else cout << "Error";
    }

    int getMark(int i = 0) {
        if (i<this->size) {
            return this->mark[i];
        } else cout << "Error";
        //return;

    }

    string getPredm(int i = 0) {
        if (i<this->size) {
            return this->pred[i];
        } else throw InvalidAdress();
        //return;

    }

    string getEntry(int i = 0) {
        if (i<this->size) {
            string s = "";
            s += this->pred[i];
            s += " - ";
            char a[2];
            itoa(this->mark[i], a, 10);
            s += a;
            return s;
        } else throw InvalidAdress();
        //return;
    }

    double mid() {
        double s = 0;
        for (int i = 0; i<this->size; i++) {
            s += this->mark[i];
        }
        s /= this->size;
        return s;
    }

};

class Student {
protected:
    int num;
    Human hum;
    Book b;
public:

    Student(int num = 1) {
        hum = Human();
        b = Book();
        this->num = num;
    }

    Student(Human hum, Book b, int num = 1) {
        this->hum = hum;
        this->b = b;
        this->num = num;
    }

    void setNum(int num = 1) {
        this->num = num;
    }

    int getNum() {
        return this->num;
    }

    string getName() {
        return this->hum.getname();
    }

    double getMid() {
        return this->b.mid();
    }

    string stip() {
        if ((int) this->b.mid() <= 3)return "0";
        if (this->b.mid() == 4)return "+";
        if (this->b.mid() > 4 && this->b.mid() < 5)return "++";
        else return "+++";
    }

    bool grad() {
        if ((int) b.mid() > 3)return true;
        return false;
    }
};

int main() {
    setlocale(0, "");
    srand(time(0));
    Human I = Human();
    cout<<I.getname()<<"  рост:"<<I.getrost()<<"  вес:"<<I.getves()<<"  возраст:"<<I.getvozrast()<<endl;
    //cout << I.getname() << endl;
    Book b = Book(5);
    cout << b.getEntry(0) << endl
            << b.getEntry(1) << endl
            << b.getEntry(2) << endl << b.getEntry(3) << endl << b.getEntry(4) << endl;
    Student s = Student(I, b);

    cout << endl <<"Cтудент "<< s.getName() << "  средний балл=" << b.mid() << " -> " << s.stip() << endl;
    if(s.grad())cout<<endl<<"Переведён"<<endl;
    else cout<<endl<<"Отчислен А.Г. Тисовским. Лично."<<endl;
}