[SuperViper]

pawn Код:

CountPlayersInVehicle(countVehicle)
{
    new playerCount;

    for(new playerIndex; playerIndex < MAX_PLAYERS; playerIndex++)
    {
        if(IsPlayerInVehicle(playerIndex, countVehicle))
        {
            playerCount++;
        }
    }

    return playerCount;
}

Usage:

pawn Код:

new clientMessage[128];
format(clientMessage, sizeof(clientMessage), "There are %d players in your vehicle.", CountPlayersInVehicle(GetPlayerVehicleID(playerid)));
SendClientMessage(playerid, -1, clientMessage);