Remélem sscanf-t használod.. 
[pawn]
CMD:fps ( playerid, params [ ] )
{
    new gPlayer;
    if ( sscanf ( params, \"i\", gPlayer ) ) return SendClientMessage ( playerid, 0x0000FF, \"Használat: /fps [playerid]\" );
    if ( !IsPlayerConnected ( gPlayer ) && ( gPalyer == INVALID_PLAYER_ID ) ) return SendClientMessage ( playerid, 0x0000FF, \"Játékos nincs csatlakozva\" );
    new str [ 128 ];
    format ( str, 128, \"%s FPS: %d\", pName ( gPlayer ), GetPlayerFPS ( gPlayer );
    SendClientMessage ( playerid, blue, str );
    return 1;
}
stock GetPlayerFPS(playerid)
{
    SetPVarInt(playerid, \"DrunkL\", GetPlayerDrunkLevel(playerid));
    if(GetPVarInt(playerid, \"DrunkL\") < 100) SetPlayerDrunkLevel(playerid, 2000);
        else{
            if(GetPVarInt(playerid, \"LDrunkL\") != GetPVarInt(playerid, \"DrunkL\"))
            {
                SetPVarInt(playerid, \"FPS\", (GetPVarInt(playerid, \"LDrunkL\") - GetPVarInt(playerid, \"DrunkL\")));
                SetPVarInt(playerid, \"LDrunkL\", GetPVarInt(playerid, \"DrunkL\"));
                if((GetPVarInt(playerid, \"FPS\") > 0) && (GetPVarInt(playerid, \"FPS\") < 256))
                {
                    return GetPVarInt(playerid, \"FPS\") - 1;
                }
            }
        }
    return 0;
}
[/pawn]