title: Why C++ standard reserves the formfeed character?
body: <p>from the following question I begin to know the meaning of \f in c++:
  <a href="https://stackoverflow.com/questions/4334370/escape-sequence-f-form-feed-what-exactly-is-it">Escape sequence \f - form feed - what exactly is it?</a>
  but why c++ have this formfeed character? is there any c++ program that runs on a typewriter? </p>