#include <iostream>
#include <math.h>
using namespace std;

const int nrow = 2; // number of rows
const int ncol = 3; // number of columns
int z[nrow][ncol] = { {1, 2, 3}, {4, 5, 6} };
  // 2d array of size nrow * ncol

int main()
{
  for (int i=0; i<nrow; ++i){
    for (int j=0; j<ncol; ++j){
      cout << z[i][j] << ' '; // output an array entry
    }
    cout << endl; // endline after last entry of a row
  }
}