title: How do I get bc(1) to print the leading zero?
body: <p>I do something like the following in a Makefile:</p>
  
  <pre><code>echo "0.1 + 0.1" | bc
  </code></pre>
  
  <p>(in the real file the numbers are dynamic, of course)</p>
  
  <p>It prints <code>.2</code> but I want it to print <code>0.2</code>.</p>
  
  <p>I would like to do this without resorting to <code>sed</code> but I can't seem to find how to get <code>bc</code> to print the zero. Or is <code>bc</code> just not able to do this?</p>