[Kitten]

error 017: undefined symbol "ClassTrucker"

It tells you whats your mistake define ClassTrucker.

Which lines are 16 and 20

Seems like your missing a bracket?

Try these two codes

pawn Код:

CMD:tr(playerid, params[])
{
    new string[256], pName[MAX_PLAYER_NAME];
    if (APlayerData[playerid][LoggedIn] == true)
    {
        if (APlayerData[playerid][PlayerClass] == ClassTrucker)
        {
            if(isnull(params))  return SendClientMessage(playerid, 0xFFFFFF, "/tr [message]");
            GetPlayerName(playerid, pName, sizeof(pName));
            format(string, sizeof(string), "{1B9FE0}(Trucker Channel)%s: %s", pName, params);
            SendClientMessageToAll(0xFFFFFFF, string);
            SendAdminText(playerid, "/tr", params);
        }
    }
     return 1;
}

CMD:pr(playerid, params[])
{
    new string[256], pName[MAX_PLAYER_NAME];
    if (APlayerData[playerid][LoggedIn] == true)
    {
        if (APlayerData[playerid][PlayerClass] == ClassPolice)
        {
            if(isnull(params))  return SendClientMessage(playerid, 0xFFFFFF, "/pr [message]");
            GetPlayerName(playerid, pName, sizeof(pName));
            format(string, sizeof(string), "{1B9FE0}(Police Channel)%s: %s", pName, params);
            SendClientMessageToAll(0xFFFFFFF, string);
            SendAdminText(playerid, "/pr", params);
        }
    }
    return 1;
}