Get a string from the terminal screen, store it in the variable
    str, and echo it on the specified window. The getstr function
    works on the stdscr window.
    Format
      #include  <curses.h>
      int getstr  (char *str);
      int wgetstr  (WINDOW *win, char *str);
1 – Arguments
 win
    A pointer to the window.
 str
    Must be large enough to hold the character string fetched from
    the window.
2 – Description
    The getstr and wgetstr functions refresh the specified window
    before fetching a string. The new-line terminator is stripped
    from the fetched string. For more information, see the scrollok
    function.
3 – Return Values
    OK                 Indicates success.
    ERR                Indicates that the function makes the screen
                       scroll illegally.