char* strstr(const char* text, const char* pattern)
{
    if (!text || !pattern) return NULL;
    for (char* textt = text ; textt* != '\0' ; textt++)
    {
        char* tmp_t = textt;
        char* tmp_p = pattern;
        while (*tmp_t != '\0' && *tmp_p != '\0')
        {
            if (*tmp_t == *tmp_p)
            {
                tmp_p++;
                tmp_t++;
            }
            else break;
        }
        if (*tmp_p == '\0') return textt;
        if (*tmp_t == '\0') break;
    }
    return NULL;
}