Something

#include <iostream>
#include "grille.h"

typedef grille<int, 5, 5> gi55;
typedef grille<char, 5, 8> ga58;

int     main()
{
  gi55 t;
  for (int li = 0; li < 5; li++)
    for (int co = 0; co < 5; co++)
      t[li][co] = li;
  std::cout << t << std::endl;
  t[5];
  ga58 t2;
  for (int li = 0; li < 8; li++)
    for (int co = 0; co < 5; co++)
      t2[li][co] = (char) (65 + li);

  std::cout << t2 << std::endl;
}