#include <iostream>
#include <iomanip>

using namespace std;

const size_t ROWS = 4;
const size_t COLS = 3;

void FillArray(int * ary);
void PrintArray(int ary[]);

int main() {

    int * ary = new int [ROWS*COLS];

    FillArray(ary);
    PrintArray(ary);

    delete [] ary;
  
    return 0;
}

void FillArray(int * ary){
    size_t row, col;

    for(row = 0; row < ROWS; row++) {
       for(col =0; col < COLS; col++) {
           ary[row*COLS + col] = static_cast<int> (row*COLS + col);
       }
    }

    return;
}

void PrintArray(int ary[]){
    size_t row, col;

    for(row = 0; row < ROWS; row++) {
       for(col =0; col < COLS; col++) {
           cout << setw(5) << ary[row*COLS + col] ;
       }
       cout << endl;
    }

    return;
}