title: C adding one char to buffer
body: <p>I would like to ask how to add one char to a buffer. For example:</p>
  
  <pre><code>char buffer[50];
  char one_symbol;
  </code></pre>
  
  <p>How to add one_symbol to <code>buffer</code>? I don't know how long the buffer is at the time, so I cant just write, for example <code>buffer[5] = one_symbol;</code></p>
  
  <p>Thanks.</p>