#include <iostream>

int * addup(int X[][4], int rows)
// I can only add up arrays that have exactly 4 columns with
// this function. Useless.
{ int * result = new int[rows];
  for (int r = 0; r < rows; r += 1)
  { result[r] = 0;
    for (int c = 0; c < 4; c += 1)
      result[r] += X[r][c]; }
  return result; }

void main()
{ int A[6][4] = { { 3, 5, 1, 2 },
                  { 4, 2, 1, 5 },
                  { 2, 4, 6, 1 },
                  { 1, 2, 5, 1 },
                  { 3, 0, 1, 0 },
                  { 2, 4, 6, 1 } };

  for (int r = 0; r < 6; r += 1)
  { for (int c = 0; c < 4; c += 1)
      cout << " " << A[r][c];
    cout << "\n"; }
  cout << "Before addition\n";

  int * R = addup(A, 6);

  cout << "After addition\n";
  for (int r = 0; r < 6; r += 1)
    cout << " " << R[r] << "\n"; }