enum TN_gsInfo
{
    Float:X,
    Float:Y,
    Float:Z,
    Price,
    Name[30],
    Pickup,
    MapIcon,
    Text3D:Label
}
new TN_gsData[][TN_gsInfo];

stock GetNextStationID()
{
    for (new i=1; i < 200; i++) if (!TN_gsData[i][Price]) return i;
    return 0;
}
CMD:addgasstation(playerid,params[])
{
    TN_OWNER;
    new Float:aX,Float:aY,Float:aZ,price,name[30];
    GetPlayerPos(playerid,aX,aY,aZ);
    if(sscanf(params,"is[30]",price,name)) return SendClientMessage(playerid,COLOR_RED,"Usage: /AddGasStation [Price] [Station Name]");
    if(price <= 0) return SendClientMessage(playerid,COLOR_RED,"Station price must be at least one dollar!");
    new id = GetNextStationID();
    if(id == 0) return SendClientMessage(playerid,COLOR_RED,"Error creating gas station!");
    new String[300];
    format(String,sizeof(String),"INSERT INTO `gasstations` (`id`,`x`,`y`,`z`,`price`,`name`) VALUES ('%d','%f','%f','%f','%d','%s')",id,aX,aY,aZ,price,name);
    QUERY(String);
    TN_gsData[id][Price] = price;
    TN_gsData[id][X] = aX;
    TN_gsData[id][Y] = aY;
    TN_gsData[id][Z] = aZ;
    format(TN_gsData[id][Name],30,"%s",name);
    TN_gsData[id][Pickup] = CreateDynamicPickup(1318, 23, TN_gsData[id][X], TN_gsData[id][Y], TN_gsData[id][Z], 0, 0, -1);
    format(String,sizeof(String),"Welcome to the %s Gas Station!\nPress and hold SPACE to fill your vehicle!",TN_gsData[id][Name]);
    TN_gsData[id][Label] = CreateDynamic3DTextLabel(String, GAS_LABEL_COLOR, TN_gsData[id][X], TN_gsData[id][Y], TN_gsData[id][Z]+0.75, 20, INVALID_PLAYER_ID, INVALID_VEHICLE_ID, true, 0, 0, -1);
    TN_gsData[id][MapIcon] = CreateDynamicMapIcon(0.0, 0.0, 0.0, 56, 0, 0, 0, INVALID_PLAYER_ID, 500.0);
    printf("FUELSYSTEM INC: Created and Loaded The %s Gas Station!", TN_gsData[id][Name]);
    Streamer_Update(playerid);
    return 1;
}

// this line is wrong
new TN_gsData[][TN_gsInfo];
// correct version
new TN_gsData[200][TN_gsInfo];