title: How to mix hexadecimal char and normal char in string literal in C++?
body: <p>Is it possible to mix '\xfd' and 'a' in a single string literal?
  For example:</p>
  
  <pre><code>unsigned char buff1[] = "\xfda";
  </code></pre>
  
  <hr>
  
  <pre><code>unsigned char buff1[] = "\x0f\x0015899999999";
  </code></pre>
  
  <p>VC++2015 reports: </p>
  
  <blockquote>
    <p>Error C2022   '-1717986919': too big for character</p>
  </blockquote>