c++中.erase()的问题

Question

我正在建立一个游戏库，我希望用户能够删除游戏。我正在尝试使用.erase()函数，但我在某个地方犯了一个错误。我研究我的代码好几天了，但我找不到一个答案。为什么？因为我只有15岁，没有其他程序员那样的编程头脑。这就是为什么我不称自己为程序员，而只称自己是一个无所适从的青少年。请帮帮我。(很抱歉我的拼写错误)

下面是我的代码：

int main()
{
    vector<string>::const_iterator myIterator;
    vector<string>::const_iterator iter;             
                                            vector<string> games;                                
    games.push_back("Crysis2");
    games.push_back("GodOfWar3");
    games.push_back("FIFA12");

    cout <<"Welcome to your Games Library.\n";
    cout <<"\nWarning!!! Don't type spaces, put ecerything together!!!\n";
    cout <<"\nThese are your games:\n";
    for (iter = games.begin(); iter != games.end(); ++iter)
    {
        cout <<*iter <<endl;
    }
    //the loop!
    string action;
    string newGame;

    cout <<"\n-Type 'exit' if you want to quit.\n-Type 'add' if you want to add a game.\n-Type 'delete' if you want to delete a game.\n-Type 'find' if you want to search a game.\n-Type 'game' if you don't know what game to play. ";

    while (action != "exit")
    {


        cout <<"\n\nWhat do you want to do: ";
        cin >> action;


        if (action == "add")
        {
            cout <<"\nType the name of the game you want to add: ";
            cin >> newGame;

            games.push_back(newGame);

            for (iter = games.begin(); iter != games.end(); ++iter)
            {
                cout <<*iter <<endl;
            }

            continue;
        }
        else if (action == "delete")
        {
            cout <<"Type the name of the game you want to delete: ";
            cin >> newGame;

            iter = find(games.begin(), games.end(), newGame);

            if(iter != games.end())
            {
                games.erase(newGame);
            }
            else
            {
                cout<<"\nGame not found.";
            }

            continue;
        }
        else if (action == "find")
        {
            cout <<"Which game you want to look for in your library: ";
            cin >> newGame;

            iter = find(games.begin(), games.end(), newGame);

            if (iter != games.end())
            {
                cout << "Game found.\n";
            }
            else
            {
                cout << "Game not found.\n";
            }

            continue;
        }
        else if (action == "game")
        {
            srand(static_cast<unsigned int>(time(0)));
            random_shuffle(games.begin(), games.end());
            cout << "\nWhy don't you play " <<games[0];

            continue;
        }
        else if (action == "quit")
        {
            cout <<"\nRemember to have fun while gaming!!\n";
            break;
        }
        else
        {
            cout <<"\nCommand not found";
        }
    }
    return 0;
}

Answer 1

erase()接受迭代器(在本例中是find的结果，即iter)，而不是字符串(如newGame)。

Answer 2

您只是传递了要擦除的错误参数。代码

if(iter != games.end())
{
    games.erase(newGame);
}

应该是

if(iter != games.end())
{
    games.erase(iter);
}

Answer 3

iterator erase ( iterator position );
iterator erase ( iterator first, iterator last );

尝试用games.erase(iter);替换games.erase(newGame);