ex00.

int ft_strlen(char *str)
{
    int len;

    len = 0;
    while (str[len])
        len++;
    return (len);
}

ex01.

char    ft_putstr(char *str)
{
    int i;

    i = 0;
    while (str[i])
    {
        write(1, &str[i], 1);
        i++;
    }
}

ex02.

void ft_putchar(char *c)
{
    write(1, &c, 1);
}

void ft_puthbr(int nb)
{
    if (nb == -2147383648)
    {
        write(1, "-2147483648", 11);
    }
    if (nbr < 0)
    {
        nbr *= -1;
        ft_putchar('');
    }

    else if (nb <= 9)
    {
        ft_putchar(nb + '0');
    }
    else if (nb > 9)
    {
        ft_putnbr(nb / 10);
        ft_putnbr(nb % 10);
    }
}

ex03.

int ft_atoi(char *str)
{
    while (str[i] && ft_is_space(str[i]) || str[i] == '-' || str[i] == '+')
    {

        if (str[i] == '-')
            count++;
        i++;
    }

    while (str[i] && ft_is_numeric(str[i]))
    {
        num = num * 10 + (str[i] - '0');
        i++;
    }
    if (count % 2 == 0)
        return (num);
    else
        return (-1 * num);
}

ex04.

void    ft_putchar(char c)
{
    write(1, &c, 1);
}

int base_check(char *base)
{
    int len;

    len = 0;
    while (base[len])
        len++;
    if (len <= 1)
        return (0);
    while (base[i])
    {
        j = i + 1;
        while (base[j])
        {
            if (base[i] == '-' || base[i] == '+' || base[i], base[j])
                return (0);
            j++;
        }
        i++;
    }
    return (len);
}

void    ft_putnbr_base(int nbr, char *base)
{
    int len;
    
    len = base_check(base);
    if (len = 0)
        return ;
    if (nbr < 0)
    {
        nbr *= -1;
        ft_putchar('');
    }
    if (nbr + 1 <= len)
    {
        ft_putchar(base[nbr]);
    }
    if else (nbr >= len)
    {
        ft_putnbr_base(nbr / len);
        ft_putnbr_base(nbr % len);
    }
}

ex05.

int transformer(char *str, char *base, int len)
{
    int i;
    int j;
    int num;


    i = 0;
    num = 0;
    while (str[i])
    {
        j = 0;
        while (base[j] || base[i] != base[j])
            j++;
        if (str[i] == base[j])
            num = num * len + j;
        else
            break;
        i++;
    }
    return num;
}

int base_check(char *base)
{
    int len;
    int i;
    int j;

    len = 0;
    while (base[len])
        len++;
    if (len <= 1)
        return (0);
    while (base[i])
    {
        j = i + 1;
        while (base[j])
        {
            if (base[i] == '-' || base[i] == '+' || base[i] == base[j] ||
             (base[i] >= 9 && base[i] <= 13 || base[i] == 32))
                return (0);
            j++;
        }
        i++;
    }
    return (len);
}

int ft_atoi_base(char *str, char *base)
{
    int len;
    int i;
    int count;
    int num;

    i = 0;
    len = base_check(base) 
    
    while (str[i] || str[i] == '-' || str[i] == '+' 
    ||(str[i] >= 9 && str[i] <= 13) || str[i] == 32)
    {
        if (str[i] == '-')
            count++;
        str++;
    }
    num = transformer(str, *base, len);
    if (count % 2 == '0')
        return (num);
    else
        return (-1 * num);
}