How to access the unordored map private from another cpp file-CodePudding

I'm new on C , and i'm trying to access a unordored map private from another cpp file but i've got some errors on compile.

I have declared the map like this:

class AccessList
{
    private:
        std::unordered_set<uint32_t> playerList;
};

on my other cpp file i could access the playerList if its was public like this:

auto playerIt = house->getGuestList().playerList.find(guid);
if (playerIt == house->getGuestList().playerList.end()) {
    house->kickPlayer(nullptr, this);
}

However, if it can't be public because i've got some crashs on this way. It needed to be private. But how i could access this map? If i access like i did before, i get this error on compile:

error: ‘std::unordered_set<unsigned int> AccessList::playerList’ is private within this context
 1192 |      auto playerIt = house->getGuestList().playerList.find(guid);

I have tried setup a function on public to get the map from private, but without success..

Thank you very much.

CodePudding user response：

The whole idea of a private class member is to control its accessibility from outside the class itself. If you need to access it, either make it public or add a function that would return a pointer or reference to the private member.

But I'd rather elaborate why making it public would cause a crash.

CodePudding user response：

The way i have figured out:

class AccessList
{
    public:
        std::unordered_set<uint32_t> getPlayerList() {
            return playerList;
        }

    private:
        std::unordered_set<uint32_t> playerList;
};

class House
{
    public:
        AccessList getGuestList() {
            return guestList;
        }
        AccessList getSubOwnerList() {
            return subOwnerList;
        }
        

    private:    
        AccessList guestList;
        AccessList subOwnerList;    
        
};

calling on other.cpp file:
    auto playerIt = house->getGuestList().getPlayerList().find(guid);
    if (playerIt == house->getGuestList().getPlayerList().end()) {
        house->kickPlayer(nullptr, this);
    }

However, it have a problem with access everytime guestList by getGuestList()?