title: scanf() for Integer OR Character
body: <p>So let's say I have a while loop that will end when the condition "isDone" is set to true. Inside the while loop, I ask the user to either enter an integer to continue the loop or a character to end it (by setting "isDone" to true).</p>
  
  <p>How would I go about this using only <strong>one</strong> scanf()?</p>