[SwisherSweet]

let me help u out a bit, lmfao

pawn Код:

CMD:hello(playerid, params[])
{
    SendClientMessage(playerid, COLOR_WHITE, "You wrote hello.");
    return 1;
}

Let me explain something to you, My guess is your trying to use ZCMD
put this #include <zcmd> at top.
Now whenever you want to make a cmd use this

pawn Код:

CMD:yourcmdhere(playerid, params[])
{
    //Your code here
    return 1;
}

This basically creates the Commands,
Put your code in where I put "//Your code here"
You welcome