/// @file 
/// @brief task C
/// g++ -std=c++20 -Imodules taskC.cpp -o taskC && ./taskC 

/// @todo include modules library header for using iue::io::savetxt
#include <fstream>
#include <iostream>
#include <vector>

/// @todo write a function initalizing a 'vector of vectors' with an integer sequence, details see main.ipynb
std::vector<std::vector<double>> initMatrix(int m, int n) {
    std::vector<std::vector<double>> matrix;
    double value = 1.0;
    for (int i = 0; i < m; i++) {
        std::vector<double> row;
        for (int j = 0; j < n; j++) {
            row.push_back(value);
            value++;
        }
        matrix.push_back(row);
    }
    return matrix;
}

/// @todo write a function to write a 'vector of vectors' to a csv-file, details see main.ipynb
void writeMatrix(std::vector<std::vector<double>> matrix, std::string filename) {
    std::ofstream file(filename);
    for (auto row : matrix) {
        for (auto i : row) {
            file << i << ",";
        }
        file << std::endl;
    }
    file.close();
}

/// @todo write a main-function and use your function to 
///   - init a 'vector of vectors' to initialize a table and
///   - write the table to a csv-file using iue::io::savetxt
int main() {
    std::vector<std::vector<double>> matrix = initMatrix(3, 4);
    writeMatrix(matrix, "matrix.csv");
}