title: Why magento configurable product have no "Add to cart" button?
body: <p>I am working on magento project. Its my first magento project. But i have learned a lot.
  I have applied theme to simple products details successfully in </p>
  
  <pre><code>template/catalog/product/view.phtml
  </code></pre>
  
  <p>Now i want to change theme for configurable products. Where can i find code for configurable products on front end? Add to cart button is not showing in configurable products.</p>