error 017: undefined symbol "GivePlayerGrana"

stock GivePlayerGrana(playerid, ammount)return Grana[playerid] += ammount;
stock GetPlayerGrana(playerid)return Grana[playerid];
stock ResetPlayerGrana(playerid)return Grana[playerid] = 0;

C:\Arquivos Maninho\• Brasil • [RedBull®] • RPG™ • v1.6 •\filterscripts\Cpia.pwn(205) : error 017: undefined symbol "Grana"
C:\Arquivos Maninho\• Brasil • [RedBull®] • RPG™ • v1.6 •\filterscripts\Cpia.pwn(206) : error 010: invalid function or declaration
C:\Arquivos Maninho\• Brasil • [RedBull®] • RPG™ • v1.6 •\filterscripts\Cpia.pwn(207) : error 010: invalid function or declaration
Pawn compiler 3.2.3664	 	 	Copyright © 1997-2006, ITB CompuPhase


3 Errors.

new Grana[MAX_PLAYERS];

Inicio Gamemode

new Grana[MAX_PLAYERS];

public PodsumowanieDriftu(playerid)
{
GivePlayerGrana(playerid,DriftPointsNow[playerid]);

Final Gamemode

stock GivePlayerGrana(playerid, ammount)return Grana[playerid] += ammount;

dcmd_grana(playerid, params[])
{
#pragma unused params
new string[100],Outroplayerid,Dimdim;

if(sscanf(params, "dd", Outroplayerid, Dimdim)) return SendClientMessage(playerid, 0x0000FFAA,"[ INFO ]{FFFFFF} Correto: /grana [ID] [$$$].");
if(!IsPlayerConnected(Outroplayerid)) return SendClientMessage(playerid, 0xFF0000FF, "[ ERROR ]{FFFFFF} Jogador Nгo Conectado.");

format(string, sizeof(string), "Vocк Presenteou O Jogador {FFFF00}%s, {FFFFFF}R$ {FFFF00}%i",NomePlayer(Outroplayerid),Dimdim);
SendClientMessage(playerid, 0xFFFFFFFF, string);
format(string, sizeof(string), "~r~Grana Recebida!!~w~!!!");
GameTextForPlayer(Outroplayerid, string, 2000, 1);
PlayerPlaySound(Outroplayerid, 1057, 0.0, 0.0, 0.0);
PlayerPlaySound(playerid, 1057, 0.0, 0.0, 0.0);
Grana[playerid]+=Dimdim;
return true;
}

stock NomePlayer(playerid)
{
new nome[MAX_PLAYER_NAME];
GetPlayerName(playerid, nome, sizeof(nome));
return nome;
}