#include <iostream>
using namespace std;

void foo1(int *fa, int fn) {
  for (int i = 0; i < fn; ++i) {
      cout << "fa[" << i << "]=" << fa[i] << " ";
  }
  cout << endl;
  for (int i = 0; i < fn; ++i) {
      cout << "*fa is " << *fa << " ";
      ++fa;
  }
  cout << endl;
}

void foo2(int *fa, int fr, int fc) {
  for (int i = 0; i < fr; ++i) {
      for (int j = 0; j < fc; ++j) {
          cout << "fa[" << i << "][" << j << "]=" << (fa+i*fc)[j] << " ";
      }
      cout << endl;
  }
}

void foo3(int fa[][4], int fr) {
  int fc = sizeof(fa[0])/sizeof(int);
  for (int i = 0; i < fr; ++i) {
      for (int j = 0; j < fc; ++j) {
          cout << "fa[" << i << "][" << j << "]=" << fa[i][j] << " ";
      }
      cout << endl;
  }
}

int main() {
  int a[][4] = { { 1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12} };
  int nrows = sizeof(a)/sizeof(a[0]);
  int ncols = sizeof(a[0])/sizeof(int);
  cout << "nrows=" << nrows << ", ncols=" << ncols << endl;
  for (int i = 0; i < nrows; ++i) {
      for (int j = 0; j < ncols; ++j) {
          cout << "a[" << i << "][" << j << "]=" << a[i][j] << " ";
      }
      cout << endl;
  }
  cout << endl << "a is " << a << endl;
  for (int i = 0; i < nrows; ++i) {
      cout << "a[" << i << "] is " << a[i] << endl;
      for (int j = 0; j < ncols; ++j) {
          cout << "&a[" << i << "][" << j << "]=" << &a[i][j] << " ";
      }
      cout << endl;
  }


  cout << endl;
  foo1(&a[0][0], nrows*ncols);
  cout << endl;
  foo2(&a[0][0], nrows, ncols);
  cout << endl;
  foo3(a, nrows);

  return 0;
}










#if 0

  for (int i = 0; i < nrows; ++i) {
      cout << "&a[" << i << "]=" << &a[i] << (i==nrows-1 ? "\n" : " ");
  }




#endif