title: which one is preferable to store characters, vector<char> or string?
body: <p>I want to store  the characters  and  following operations are performed </p>
  
  <ol>
  <li>Add the characters</li>
  <li>find the characters</li>
  <li>delete the characters</li>
  </ol>
  
  <p>I think all these operations have O(n) complexity for both <code>vector&lt;char&gt;</code>and <code>string</code> , which one I should prefer and why?</p>