Kod

include <iostream>
#include <cstdlib>
#include <time.h>
#include <string>
using namespace std;

class Macierz{
    double **dane;
    int m, n;
public:
    Macierz(int m, int n = 1, int wart = 0){
        this->m = m;
        this->n = n;
        dane = new double*[m];
        for (int i    = 0; i < m; ++i) {
            dane[i] = new double[n];
            for (int j = 0; j < n; ++j) {
                dane[i][j] = wart;
            }
        }

    }
    Macierz & operator+(const Macierz &a){
        for (int i    = 0; i < m; ++i)
            for (int j = 0; j < n; ++j)
                this->dane[i][j] += a.dane[i][j];
        return *this;
    }

    ostream& operator<<(ostream& out){
        for (int i    = 0; i < m; ++i) {
            for (int j = 0; j < n; ++j) {
                cout<< dane[i][j] << " ";
            }
            cout<< endl;
        }
        cout<< endl;
        return out;
    }

    void fill(int min = 1, int max = 10){
        srand(time(NULL));
        for (int i    = 0; i < m; ++i)
            for (int j = 0; j < n; ++j)
                this->dane[i][j] = (rand()%max) + min;
    }
    int getM() const {return m;}
    int getN() const {return n;}
    int getValue (const int i, const  int j) const {
        if(i>=m || j>=n || i<0 || j<0) return -1;
        return dane[i][j];
    }
    ~Macierz(){
        for (int i = 0; i < m; ++i)
            delete[] dane[i];
        delete[] dane;
    }
    void wypisz(){ //dla testów
        for (int i    = 0; i < m; ++i) {
            for (int j = 0; j < n; ++j) {
                cout<< dane[i][j] << " ";
            }
            cout<< endl;
        }
    }
};


class Miernik{
public:
    virtual void pomiar() = 0;
    virtual ~Miernik() { cout<< " Destruktor";};
};
class Woltomierz: public Miernik{
    string jednostka = "V";
public:
    void pomiar() {cout<< " Jestem Woltomierzem. Jednostka: " << jednostka << endl;};
};
class Amperiomierz: public Miernik{
    string jednostka = "A";
public:
    void pomiar() {cout<< " Jestem Amperomierzem. Jednostka: " << jednostka<< endl;};
};
class Watomierz: public Miernik{
public:
    string jednostka = "W";
    void pomiar() {cout<< " Jestem Watomierzem. Jednostka: " << jednostka<< endl;};
};

int main() {
    Macierz *m1 = new Macierz(3,3,9);
    Macierz *m2 = new Macierz(3);
    Macierz *m3 = new Macierz(3,3,9);
    m3->fill(1,10);
    int liczba = 0;

    (Macierz) liczba;

    m1->wypisz();
    m2->wypisz();
    m3->wypisz();

    *m2 = *m1+*m3;

    m2->wypisz();

    int l = 0;
    cout<< m2->getValue(l,2);


    m2->wypisz();


    ///////////////////////DEMONSTRACJA

    Miernik *miernik;
    Woltomierz volt;
    Amperiomierz amper;
    Watomierz wat;

    miernik = &volt;
    miernik->pomiar();

    miernik = &amper;
    miernik->pomiar();

    miernik = &wat;
    miernik->pomiar();
    return 0;
}