Move the cursor to coordinates (y,x), get a character from the
    terminal screen, and echo it on the specified window. The mvgetch
    function acts on the stdscr window.

    Format

      #include  <curses.h>

      int mvgetch  (int y, int x);

      int mvwgetch  (WINDOW *win, int y, int x);

  Additional Information (explode) :

• Arguments
• Description
• Return Values