Initializes the terminal-type data and all screen functions. You
    must call initscr before using any of the curses functions.

    Format

      #include  <curses.h>

      void initscr  (void);

1 - Description

    The OpenVMS Curses version of the initscr function clears the
    screen before doing the initialization. The BSD-based Curses
    version does not.