char    *ft_strnew(size_t size)
    {
    char    *temp;
    size_t  i;

    if (!(temp = (char*)malloc(sizeof(char) * (size + 1))))
        return (NULL);
    i = 0;
    while (i < size)
    {
        temp[i] = '';
        i++;
    }
    temp[i] = '';
    return (temp);
}

char    *ft_strjoin(char const *s1, char const *s2)
{
    char    *temp;
    int     i;
    int     j;

    if (!(temp = (char*)malloc(sizeof(char) *
        (ft_strlen(s1) + ft_strlen(s2) + 1))))
        return (NULL);
    i = 0;
    j = 0;
    while (s1[i])
    {
        temp[j] = s1[i];
        i++;
        j++;
    }
    i = 0;
    while (s2[i])
    {
        temp[j] = s2[i];
        i++;
        j++;
    }
    temp[j] = '';
    return (temp);
}

int         left_one(int *i, char c)
{
    if (--(*i) < 0)
        return (0);
    else
        return (c - '0');
}

char        *add_char(char *nbr1, char *nbr2)
{
    int     i;
    int     j;
    int     left[4];
    char    *temp;

    left[0] = 0;
    temp = ft_strnew(0);
    i = ft_strlen(nbr1);
    j = ft_strlen(nbr2);
    if (i > j)
        left[3] = i;
    else
        left[3] = j;
    while (--left[3] >= 0)
    {
        left[1] = left_one(&i, nbr1[i - 1]);
        left[2] = left_one(&j, nbr2[j - 1]);
        left[0] += left[1] + left[2];
        temp = ft_charjoin((left[0] % 10) + '0', temp, 'l');
        left[0] /= 10;
    }
    if (left[0] > 0)
        temp = ft_charjoin((left[0] % 10) + '0', temp, 'l');
    return (temp);
}

char        *multi1_char(char *nbr1, int nbr2)
{
    int     i;
    char    *temp;

    if (nbr1[0] == '0' || nbr2 == 0)
        return ("0");
    i = -1;
    temp = ft_strdup(nbr1);
    while (++i < nbr2 - 1)
        temp = add_char(temp, nbr1);
    return (temp);
}

char        *multi_char(char *nbr1, char *nbr2)
{
    int         i;
    char        *temp;
    int         j;
    char        *temp1;
    int         t;
    char        *mul;

    mul = ft_strnew(0);
    temp = ft_strnew(1);
    j = 0;
    i = ft_strlen(nbr2);
    while (--i >= 0)
    {
        t = -1;
        temp1 = multi1_char(nbr1, nbr2[i] - '0');
        //temp1 = multi1_char(temp1, 10*j);
        /*while (++t < j)
            temp1 = ft_strjoin(temp1, "0");*/
        temp1 = ft_strjoin(temp1, mul);
        temp = add_char(temp, temp1);
        mul = ft_strjoin("0", mul);
        j++;
    }
    return (temp);
}

char    *power_char(int nbr1, int nbr2)
{
    char        *temp;

    temp = ft_strnew(0);
    if (nbr2 == 1)
        return (ft_itoa(nbr1));
    if (nbr2 % 2 == 0)
    {
        temp = power_char(nbr1, nbr2 / 2);
        return (multi_char(temp, temp));
    }
    else
    {
        nbr2 -= 1;
        temp = power_char(nbr1, nbr2 / 2);
        return(multi_char(ft_itoa(nbr1), multi_char(temp, temp)));
    }
}