This paper highlights the problem of constructing cfg in object - oriented systems and proposes a new model named extended control flow graph ecfg for code based analysis of object - oriented software 本文着重介绍在面向对象系统中如何构造控制流图,并对面向对象软件的基于代码的分析提出了一个名为扩展控制流图ecfg的新模型。