title: Counting words in a string input by the user
body: <p>So I'm working on some review questions for the last chapter in my homework.</p>
  
  <p>My question is, if a user inputs a string sentence, how would I go about counting the number of words?  I don't think it was covered in class, or will be covered in class.</p>
  
  <p>I've gotten as far as requesting the sentence and using getline to read the string, but how would I go about counting the individual words other than writing the input to a file, opening the same file, and counting the words that way? </p>