int ra(int *tab)
{
        int i = 0;
        int tmp = 0;

        tmp = tab[0];
        while (tab[i] != '\0') {
                tab[i] = tab[i + 1];
                i = i + 1;
        }
        tab[i - 1] = tmp;
        my_putstr("ra ");
        return (tab);
}