#include "subroutines.h"

int subroutine_2(string fname_1, string fname_2, int n)
{
    double *matrix = new double[n * n];
    if (matrix == NULL) {
        return -1;
    }

    double *vector = new double[n];
    if (vector == NULL) {
        free(vector);
        return -2;
    }

    fstream fp_1(fname_1, fstream::in);
    if (!fp_1.is_open()) {
        free(matrix);
        free(vector);
        return 1;
    }

    fstream fp_2(fname_2, fstream::out);
    if (!fp_2.is_open()) {
        fp_1.close();
        free(matrix);
        free(vector);
        return 2;
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++)
            fp_1 >> matrix[i * n + j];
    }
    fp_1.close();

    int pos = 0;
    double max = -INT_MAX;

    for (int i = 0; i < n; i++) {

        double temp = 0;
        for (int j = 0; j < n; j++) {
            temp += abs(matrix[i * n + j]);
        }
        if (temp > max) {
            max = temp;
            pos = i;
        }

    }

    for (int i = 2; i < n; i++)
        vector[i - 2] = matrix[pos * n + i];
    vector[n - 2] = matrix[pos * n];
    vector[n - 1] = matrix[pos * n + 1];

    for (int i = 0; i < n; i++) {
        fp_2 << std::fixed;
        fp_2 << setw(9) << setprecision(3) << vector[i] << " ";
    }
    fp_2.close();

    free(matrix);
    free(vector);
    return 0;
}