#include "subroutines.h"

using namespace std;

int subroutine_1(string fname_1, string fname_2)
{
    int n = 0;
    fstream fp(fname_1, fstream::in);
    if (!fp.is_open())
        return -1;

    fp >> n;
    fp.close();
    if (n <= 0)
        return -10;

    double *matrix = new double[n * n];
    if (matrix == NULL)
        return -3;

    fp.open(fname_2, fstream::out);
    if (!fp.is_open())
        return -2;

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            matrix[i * n + j] = (abs(j - 3) - 1.3) * (6.5 - j) * pow(2, j - 1) * (2 * abs(3.3 - i) - 1.5);
        }
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            fp << std::fixed;
            fp << setw(9) << setprecision(3) << matrix[i * n + j] << " ";
        }
    }

    return n;
}