title: How to get the largest precision floating point data type of implemenation and its printf specifier?
body: <p>Or put differently, are there equivalents to <code>intmax_t</code> and <code>%jd</code> but for floating point numbers?</p>
  
  <p>This has already been asked as a side question <a href="https://stackoverflow.com/questions/3874586/some-questions-about-floating-points">here</a>, but the question is so large that I think people forgot to answer the side question. Also that was tagged as c++, and I'm looking for a c solution.</p>
  
  <p>Related questions:</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/questions/12332366/float-double-in-c99">Are there float and double types with fixed sizes in C99?</a></li>
  </ul>