need help with convert simple lua script to c++ code

[trans]

Hello, so i have problem, i dont know how make c++ code so i need help, maybe someone can help me. I need script like that:

function onAttack(cid, target)

local myGuild = getPlayerGuildId(cid)

 if(target == "monster name") then
	if(myGuild == getGlobalStorageValue(19893)) then
			return FALSE
	else
		return TRUE
	end
end
	
return TRUE
end

If player have guild with id like value in globalstorage then he cant atack "monster name". But ... this script in lua dont work for spells so i need make it in combat.cpp right? in this place:

		else if(target->getMonster())
		{
			if(attackerPlayer->hasFlag(PlayerFlag_CannotAttackMonster))
				return RET_YOUMAYNOTATTACKTHISCREATURE;
		}

but i dont know how :/ maybe someone can help me with convert lua script to code c++