/// @file
/// @brief task B
/// g++ -std=c++20 taskB.cpp -o taskB && ./taskB

#include <iostream>
#include <vector>

/// @todo implement your functions here, details see main.ipynb
/// @todo    "  1. `sum`: **Summe** aller Elemente eines `Vector'",
int sum(std::vector<double> vector) {
    double sum = 0;
    for (auto i : vector) {
      sum += i;
    }
    return sum;
}

/// @todo   "  2. `sum`: **Summe** aller Elemente einer `Matrix`",
int sum(std::vector<std::vector<int>> matrix) {
    int sum = 0;
    for (auto row : matrix) {
      for (auto i : row) {
        sum += i;
      }
    }
    return sum;
}

/// @todo   "  3. `print`: **Formatierte Ausgabe** (in der Konsole) eines `Vectors` (in einer Zeile)",
void printVector(std::vector<double> vector) {
  for (auto i : vector) {
    std::cout << i << " ";
  }
  std::cout << std::endl;
}

/// @todo   "  3. `print`: **Formatierte Ausgabe** (in der Konsole) einer `Matrix` (Zeile für Zeile)",
void printMatrix(std::vector<std::vector<int>> matrix) {
  for (auto row : matrix) {
    for (auto i : row) {
      std::cout << i << " ";
    }
    std::cout << std::endl;
  }
}

/// @todo   "  4. `cout_even`: **Abzählen** wie viele Elemente einer `Matrix` gerade sind",
int countEven(std::vector<std::vector<int>> matrix) {
  int count = 0;
  for (auto row : matrix) {
    for (auto i : row) {
      if (i % 2 == 0) {
        count++;
      }
    }
  }
  return count;
}

/// @todo   "  5. `mean`: **Durchschnitt aller Elemente** einer `Matrix`",
float meanMatrix(std::vector<std::vector<int>> matrix) {
  int sum = 0;
  int count = 0;
  for (auto row : matrix) {
    for (auto i : row) {
      sum += i;
      count++;
    }
  }
  return (float)sum / count;
}

int main() {

  // one-dimensional sequence (vector) with 5 values
  std::vector<double> vec{1.2, 2.5, 3., 4.1, 5.9};

  // two-dimensional sequence, here we call it a matrix, with 3 rows with 4 values in each row
  std::vector<std::vector<int>> mat{{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};

  /// @todo call your functions using 'vec' or 'mat' as arguments and print the results

  std::cout << "Sum of vector: " << sum(vec) << std::endl;
  std::cout << "Sum of matrix: " << sum(mat) << std::endl;
  std::cout << "Print vector: ";
    printVector(vec);
  std::cout << "Print matrix: ";
    printMatrix(mat);
  std::cout << "Count even: " << countEven(mat) << std::endl;
    std::cout << "Mean of matrix: " << meanMatrix(mat) << std::endl;



  return 0;
}