title: sizeof() applied to structure and variable
body: <p>consider the following snippet:</p>
  
  <pre><code>struct foo {
    int a;
    int b;
    int c;
  };
  
  struct foo f;
  printf("%u, %u\n", sizeof(struct foo), sizeof(f));
  </code></pre>
  
  <p>The code returns the same values, but I was wondering if sizeof() applied to variable is correct or this is just coincidence?</p>
  
  <p>Thanks.</p>