duota n 3x3 matricų. rasti determinantų sumą ir vidurkį
elementus iš klaviatūros
1) butina klase
2) destruktoriai all that shit
3) rodykles ir dinamine atmintis


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

class Determinantas
{
   private:
     int x1, x2, x3, y1, y2, y3, z1, z2, z3;
     double determinantas;
   public:
     Determinantas() : x1(0), x2(0), x3(0), y1(0), y2(0), y3(0), z1(0), z2(0), z3(0) {}
     Determinantas (int a, int b, int c, int d, int e, int f, int g, int h, int i) : x1(a), x2(b), x3(c), y1(d), y2(e), y3(f), z1(g), z2(h), z3(f){}
     ~Determinantas(){}
     //
     void Ivedimas()
         {
             cout << "Iveskite matricos elementus: \n";
             cin >> x1 >> y1 >> z1 >> x2 >> y2 >> z2 >> x3 >> y3 >> z3;
         }
     void showData()
         {
             cout << "Matrica atrodo taip: \n";
             cout << x1 << " " << y1 << " " << z1 << " \n";
             cout << x2 << " " << y2 << " " << z2 << " \n"
             cout << x3 << " " << y3 << " " << z3 << " \n"
         }
     int Skaiciavimas()
         {

             determinantas = (x1*y2*z3)+(y1*z2*x3)+(z1*x2*y3)-(z1*y2*x3)-(y1*x2*z3)-(x1*z2*y3);
             return determinantas;
         }
};

int maint ()
{
    int n, suma=0;
    double vidurkis=0;
    cout << "Iveskite matricu skaiciu: \n";
    cin >> n
    Determinantas *matrix = new Determinantas[n];  // *matrix - rodykle // new Determinans[n] // sukuriama dinamine atmintis
    for (int i = 0; i++; i<n)
    {
        matrix[i].Ivedimas();
        matrix[i].showData();
        matrix[i].Skaiciavimas();
        suma = suma + matrix[i].skaiciavimas();
    }
    vidurkis = suma / n;
    return 0;
}