EXERCISE 00: FT_STRCMP
FILE: FT_STRCMP.C


int ft_strcmp(char *s1, char *s2)
{
    int i = 0;
    while (s1[i] && s1[i] == s2[i])
        i++;
    return ((unsigned char)s1[i] - (unsigned char)s2[i]);
}

int ft_strcmp(char *s1, char *s2)
{
	int i = 0;
	while (s1[i] && s1[i] == s2[i])
		i++;
	return ((unsigned char)s1[i] - (unsigned char)s2[i]);
}

EXERCISE 01: FT_STRNCMP
FILE: FT_STRNCMP.C

int ft_strncmp(char *s1, char *s2, unsigned int n)
{
    unsigned int i = 0;
    if (n == 0)
        return 0;
    while (s1[i] && s2[i] && s1[i] == s2[i] && i < n - 1)
        i++;
    return ((unsigned char)s1[i] - (unsigned char)s2[i]);
}

int ft_strncmp(char *s1, char *s2, unsigned int n)
{
	unsigned int i = 0;
	if (n == 0)
	return 0;
	while (s1[i] && s2[i] && s1[i] == s2[i] && i< n-1)
	i++;
	return ((unsigned char)s1[i] - (unsigned char)s2[i]);
}

EXERCISE 02: FT_STRCAT
FILE: FT_STRCAT.C

char *ft_strcat(char *dest, char *src)
{
    int i = 0;
    int j = 0;
    while (dest[i])
        i++;
    while (src[j])
    {
        dest[i + j] = src[j];
        j++;
    }
    dest[i + j] = '\0';
    return dest;
}

EXERCISE 03: FT_STRNCAT
FILE: FT_STRNCAT.C

char *ft_strncat(char *dest, char *src, unsigned int nb)
{
    unsigned int i = 0;
    unsigned int j = 0;
    while (dest[i])
        i++;
    while (src[j] && j < nb)
    {
        dest[i + j] = src[j];
        j++;
    }
    dest[i + j] = '\0';
    return dest;
}

EXERCISE 04: FT_STRSTR
FILE: FT_STRSTR.C

char *ft_strstr(char *str, char *to_find)
{
    int i, j;

    if (!to_find[0])
        return str;
    i = 0;
    while (str[i])
    {
        j = 0;
        while (str[i + j] && to_find[j] && str[i + j] == to_find[j])
            j++;
        if (!to_find[j])
            return &str[i];
        i++;
    }
    return 0;
}
EXERCISE 05: FT_STRLCAT
FILE: FT_STRLCAT.C

unsigned int ft_strlen(char *str)
{
    unsigned int len = 0;
    while (str[len])
        len++;
    return len;
}

unsigned int ft_strlcat(char *dest, char *src, unsigned int size)
{
    unsigned int dest_len = ft_strlen(dest);
    unsigned int src_len = ft_strlen(src);
    unsigned int i = 0;

    if (size <= dest_len)
        return size + src_len;
    while (src[i] && (dest_len + i) < size - 1)
    {
        dest[dest_len + i] = src[i];
        i++;
    }
    dest[dest_len + i] = '\0';
    return dest_len + src_len;
}

unsigned int ft_strlen(char *str)
{
	unsigned int len = 0;
	while (str[len])
		len++;
	return len;
}