Text adventure game, how to make loop

[GrubKiller]

If the user inputs something other than 'a' or 'A'. Then it will simply ignore it and wont output the cout statement. How do i make it so that if the user doesn't input 'A' or 'a'. it loops back and asks the user to enter 'A' or 'a'. and repeat until the user does.

[code]
cout << "You awaken in the middle of a forest... fully naked." << endl;
cout << "Press 'A' then enter to look around." << endl;

char userInputA;
cin >> userInputA;

if (userInputA == 'a' || userInputA == 'A')
{
cout << "You search around for any clues as to where you are." << endl << "In the distance you are able to see gray smoke" << endl;
}

[markyrocks]

Lol this is untested but I been working on using these kinds of expressions more.

While(cin.get() != 'a' | 'A' ? True : False && SomeFunc();)
{  //user didn't enter a

}
Void SomeFunc(){

//User entered a
}