Getline 不让我输入，C++

我试图获得用户选择的游戏名称，并将其存储在向量中。我使用getline以便用户可以使用空间。当我尝试键入一个新游戏来添加时，它不允许我。它自动显示我的游戏库。请告诉我我做错了什么。问题出现在如果（操作=="添加"）

这是我的代码：

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <ctime>
#include <cstdlib>
using namespace std;
int main()
{
     vector<string>::const_iterator myIterator;
vector<string>::const_iterator iter;                
vector<string> games;                                
games.push_back("Crysis 2");
games.push_back("GodOfWar 3");
games.push_back("FIFA 12");
cout <<"Welcome to your Games Library.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.n-Type 'show' if you want to view your library.";
while (action != "exit")
{

    cout <<"nnWhat do you want to do: ";
    cin >> action;
              //problem is here
    if (action == "add")
    {
        cout <<"nType the name of the game you want to add: ";
        getline (cin, newGame);
        games.push_back(newGame);
        for (iter = games.begin(); iter != games.end(); ++iter)
        {
            cout <<*iter <<endl;
        }
        continue;
    }
    else if (action == "show")
    {
        cout <<"nThese are your games:n";
        for (iter = games.begin(); iter != games.end(); ++iter)
        {
            cout <<*iter <<endl;
        }
    }
    else if (action == "delete")
    {
        cout <<"Type the name of the game you want to delete: ";
        cin >> newGame;
        getline (cin, newGame);
        iter = find(games.begin(), games.end(), newGame);
        if(iter != games.end())
        {
            games.erase(iter);
            cout <<"nGame deleted!";
        }
        else
        {
            cout<<"nGame not found.";
        }
        continue;
    }
    else if (action == "find")
    {
        cout <<"Which game you want to look for in your library: ";
        cin >> newGame;
        getline (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;
}