title: check if program argument equals a single character
body: <p>I want to read argument and then compare it with a character:</p>
  
  <pre><code>int main (int argc, char *const argv[]) {
      if (argv[1][1] == 'c') {
          client();
      }
      else if (argv[1][1] == 's') {
          server();
      }
  
      return 0;
  }
  </code></pre>
  
  <p>It works if I type <code>cc</code> or <code>dd</code>, it also works if I type <code>ccttttt</code>. It's just taking the second character, but I'd like it to work only if I type <code>c</code>.</p>