[CracK]

I suggest you to use zcmd and sscanf
It will look like:

pawn Код:

cmd(givescore, playerid, params[])
{
  if(IsPlayerAdmin(playerid))
  {
    new id;
    if(sscanf(params,"i",id)) SendClientMessage(playerid, 0xFFFFFFFF, "USAGE: /givescore [id]");
    else SetPlayerScore(id,GetPlayerScore(id)+1);
    return 1;
  }
  return 0;
}