[OOP]Lab2

#include <iostream>

using namespace std;

struct matrix {
    int n;
    float **m;

    matrix() {}

    matrix (int an)
    {
        n = an;
        init();
    }

    void init()
    {
        m = new float*[n];
        for (int i = 0; i < n; i++)
        {
            m[i] = new float[n];
        }
    }

    void input()
    {
        cout << "Input n: ";
        cin >> n;
        init();
        cout << "Input matrix: " << endl;
        for (int i = 0; i < n; i++)
            for (int j = 0; j < n; j++)
                cin >> m[i][j];
    }

    void print()
    {
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++)
                cout << m[i][j] << " ";
            cout << endl;
        }
    }

    matrix operator+(matrix a)
    {
        matrix rez = matrix(n);
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++) {
                rez.m[i][j] = m[i][j] + a.m[i][j];
            }
        }

        return rez;
    }

    matrix operator-(matrix a)
    {
        matrix rez = matrix(n);
        for (int i = 0; i < n; i++){
            for (int j = 0; j < n; j++) {
                rez.m[i][j] = m[i][j] - a.m[i][j];
            }
        }

        return rez;
    }

    matrix operator*(matrix a)
    {
        matrix multed = matrix(n);
        for (int i = 0; i<n; i++){
            for (int j = 0; j<n; j++){
                multed.m[i][j] = 0;
                for (int s = 0; s<n; s++){
                    multed.m[i][j] = multed.m[i][j] + (m[i][s] * a.m[s][j]);
                }
            }
        }

        return multed;
    }
};

void main()
{
    matrix a, b, c, d;
    a.input();
    b.input();
    c.input();

    d = a*b + c*a - a*c;
    d.print();

    cin.ignore();
    cin.get();

}