title: previous definition of 'class mpicomm' error
body: <p>Could someone tell me why am I getting this error?</p>
  
  <p>"previous definition of 'class mpicomm'"</p>
  
  <pre><code>class mpicomm{
  
  public:
      mpicomm()
      {
  
      }
  };
  </code></pre>
  
  <p>thanks!</p>