title: Syntax for using an array of wires as input
body: <p>I have the following module:</p>
  
  <pre><code>module add_8bit ( output wire co,
                output wire [7:0] r,
  
                input wire ci,
                input wire [7:0] x,
                input wire [7:0] y );
  </code></pre>
  
  <p>I am trying to use it via the following code:</p>
  
  <pre><code> wire rbit [7:0];
   wire onebit [7:0];
   wire twocomp [7:0];
  
   wire tco, tci;
  
   add_8bit t9 ( tco, twocomp, tci, rbit, onebit );
  </code></pre>
  
  <p>It will NOT compile because of the last line, why?</p>
  
  <p>Thanks.</p>