而循环搞乱了

Question

当我选择actres或电影标题时，我正在尝试编写一个存在while循环的while循环。但由于某种原因，它没有告诉我while (selecton)行有错误。有人有想法吗？

string selection;

while ( selection )
{
    cin >> selection;

    if ( selection == "actress" )
    {
        cout << "hey" << endl;
        break;
    }
    else if ( selection == "movie title" )
    {
        cout << "bye";
        break;
    }
    else
    {
        cout << "Please choose a selection";
    }
}

Answer 1

应该是while(cin>>selection)

但是最好写while(getline(cin,selection))，这样就不会跳过白线。