lass="identifier">argv</span><span class="special">)</span><span class="special">;</span>
  <span class="special">}</span>
</pre>
<p>The instance of <code class="computeroutput">environment</code> will initialize MPI (by calling <code class="computeroutput">MPI_Init</code>) in its constructor and finalize MPI (by calling <code class="computeroutput">MPI_Finalize</code> for normal termination or <code class="computeroutput">MPI_Abort</code> for an uncaught exception) in its destructor.</p>
<p>The use of <cod