title: Why c++ standard support function strftime but not strptime?
body: <p>Why C++ standard support function <code>strftime()</code> but not <code>strptime()</code>?  <code>strftime()</code> is available to change a time to string, but there isn't a function which can change a string back to time.</p>
  
  <p>On Posix <code>strptime()</code> is available as a C-like function, using it need to take care of the potential problem of mixed C and C++ code.</p>