/// @file
/// @brief Task1: "single-file" executable C program

/// @todo Include C standard library headers, as needed

/// @todo Implement a function 'max_column_sum' according to the description below:
/// The function receives a "m x n"-matrix holding signed integer values stored in a contiguous block of memory using
/// row-major layout. Specifically it receives these arguments
///   - number of rows m
///   - number of columns n
///   - pointer to a contiguous block of memory containing m*n signed integer values
///   - row-major storage order is used, access of element (i,j) -> data[j + n*i]
/// The function then calculates the maximum column sum, i.e. the maximum sum of values in one column of the matrix, and
/// returns this value.

/// @todo Implement a 'main' function conducting the following tasks in this order:
/// - construct three local variables containing the following values:
///   - an integer value for the number of rows: 2
///   - an integer value for the number of columns: 4
///   - an array of integer values to be interpreted as a 2x4 matrix in row-major layout containing these values:
///     {5, -2, -12, 4, 1, 3, -5, 6}
/// - use your function to calculate the maximum column sum of the 2x4 matrix specified by your three local variables
/// - print the result to the console


/// @file
/// @brief Task1: "single-file" executable C program

#include <stdio.h>

/// Function to calculate the maximum column sum of a matrix
int max_column_sum(int m, int n, int data[]) {
  int max_sum = data[0]; // Initialize with first element

  // Loop through each column
  for (int j = 1; j < n; j++) {
    int current_sum = 0;
    // Loop through each row in the current column
    for (int i = 0; i < m; i++) {
      // Calculate sum of elements in current column
      current_sum += data[j + n * i];
    }
    // Update max_sum if current sum is greater
    if (current_sum > max_sum) {
      max_sum = current_sum;
    }
  }

  return max_sum;
}

int main() {
  // Define matrix dimensions
  int rows = 2;
  int cols = 4;

  // Define matrix data in row-major order
  int data[] = {5, -2, -12, 4, 1, 3, -5, 6};

  // Calculate maximum column sum
  int max_column_sum_value = max_column_sum(rows, cols, data);

  // Print the result
  printf("Maximum column sum: %d\n", max_column_sum_value);

  return 0;
}