title: Finding size of a binary file
body: <p>I have a binary file and I want to read all of them. I thought, I should find its size and use fread function but I cant find the size. Do you have any idea?</p>
  
  <pre><code>size_t size, size_begin, size_end;
  
  size_begin = fseek(dir_file, 0, SEEK_END);
  size_end = fseek(dir_file, 0, SEEK_SET);
  
  size = size_end - size_begin;
  </code></pre>