public OnPlayerGiveDamage(playerid, damagedid, Float: amount,weaponid)
{
    if (damagedid != INVALID_PLAYER_ID)
    {
        new string[20];
        format(string, sizeof(string), "~y~-~r~%.0f", amount);//Aqui й a mensagem que aparece!
        GameTextForPlayer(playerid, string, 1000, 6);
        GameTextForPlayer(damagedid, string, 1000, 5);
        PlayerPlaySound(damagedid, 17802, 0.0, 0.0, 0.0);// som do "sino"
    }
    return 1;
}