title: Align Integer using cout in C++
body: <p>I need C++ to use cout to print:</p>
  
  <pre><code>Header
       1
       2
       3
       4
       5
      10
      11
      12
  </code></pre>
  
  <p>instead of </p>
  
  <pre><code>Header
      1
      2
      3
      4
      5
      10
      11
      12
  </code></pre>
  
  <p>How should I format this using cout?</p>