title: Using logical operators with macros
body: <p>I have a piece of code which I want to include if either of two macros are defined</p>
  
  <pre><code>#ifdef MACRO1 || MACRO2
  
  void foo()
  {
  
  
  }
  
  #endif
  </code></pre>
  
  <p>How do I accomplish this in C?</p>