title: C++ Variable Confusion
body: <p>I'm new to programming C++. Consider the following code:</p>
  
  <pre><code>int a;
  a = 4;
  int b = a;
  b++;
  </code></pre>
  
  <p>At the end of this code, <code>a=4</code> and <code>b=5</code>. I would like it if <code>a=5</code> through modifying <code>b</code>. How do I modify my code so that this happens? Thanks!</p>