MagicSquare的图形代码，BC3.1的，需要BC提供的几个图形库，写这些代码的时候真天真。如今BC是彻底被人抛弃了，但代码的灵魂还是一样的-MagicSquare graphics code, BC3.1 need BC to provide a few graphics library, write the code when really naive. Now BC is being completely abandoned, but the soul is still the sa