一个绘制Petri Net 图的程序，是我个人编写的，当然也借鉴了不少别人的代码，虽然还不完善，但却可以提供给很多正要写这方面程序的人提供帮助！-A drawing Petri Net plans are prepared by my own, of course, draw a lot of other people s code, although not perfect, but it does provide for a lot of procedures are to write in