double t1 = 0.0, t2 = 0.0, v1, v2, res;
            double input_array[n3_i][n3_j];
            double res_array[4][n3_j * n3_j];
            int rc = 0;
            cout << "Enter 2 x 5 matrix: \n";
            for (int i = 0; i < n3_j; i ++) {
                scanf("%lf%lf", &t1, &t2);
                input_array[0][i] = t1;
                input_array[1][i] = t2;
            }