title: Does C++ have an array placeholder similar to Fortran's colon A[2][:]?
body: <p>Supposing I have an array <code>A[n][m]</code>, and I want to read or write to a row/column of <code>A</code>.</p>
  
  <p>If I wanted to access the third row of the matrix, how can I reference it like</p>
  
  <pre><code>A[3][:] 
  </code></pre>
  
  <p>Is this possible in C++ without using a loop?</p>