[Threshold]

pawn Код:

stock ResetPlayerInfo(playerid)
{
    fSweeperPos[playerid][0] = 0;
    fSweeperPos[playerid][1] = 0;
    fSweeperPos[playerid][2] = 0;
    PlayerSweeping[playerid] = 0;
    SweeperTime[playerid] = 0;
    SweeperDistance[playerid] = 0;
    return 1;
}

You need to specify whether the function has parameters or not. If there are no parameters, you just need to place '()'.

EDIT: Below poster was right, you need a 'playerid' parameter.