Strcmp or strcat , can we compare or concatenate with offset ? how please?

Projects Programming
6

output

find: def defghijklmnopqrst
find: 248 not found
find: 6abc 6abcdefghijklmnopqrst


char *
find (
    const char *haystack,
    const char *needle )
{
    char *s = strstr (haystack, needle);

    Serial.print ("find: ");
    Serial.print (needle);
    Serial.print (" ");

    if (s)
        Serial.println (s);

    else  {
        Serial.println ("not found");
    }
    return s;
}

// -----------------------------------------------------------------------------
void setup ()
{
    Serial.begin (19200);

    const char *haystack  = "123456abcdefghijklmnopqrst";

    find (haystack, "def");
    find (haystack, "248");
    find (haystack, "6abc");
}

// -----------------------------------------------------------------------------
void loop ()
{
}
2 Likes