title: Use types in <cstdint> with or without namespace
body: <p>In C++11 I can choose whether I want to use the types defined in  with or without the namespace std::</p>
  
  <p>At least my compiler (g++ 4.7) accepts both variants.</p>
  
  <p>My question is: What is the recommended way to use the typedefs from cstdint. With or without the namespace? What are the advantages or disadvantages? Or is it only a matter of style?</p>
  
  <p>so variant a):</p>
  
  <pre><code>#include &lt;cstdint&gt;
  std::uint8_t n = 21;
  </code></pre>
  
  <p>resp:</p>
  
  <pre><code>#include &lt;cstdint&gt;
  using std::uint8_t;
  uint8_t n = 21;
  </code></pre>
  
  <p>or variant b):</p>
  
  <pre><code>#include &lt;cstdint&gt;
  uint8_t n = 21;
  </code></pre>